^What he said.
The Thrustmaster is perfect for the DCS A-10C addict, but the stick does not twist and therefore requires additional gear, rudder pedals. That's another $100+ on top of a $400-500 flight stick, and you're in Australia so we could easily add 10%-20% to these estimates I assume.
The key features of the TM Warthog HOTAS includes it's near 1:1 realism, 4 springs including a strong central centering spring for smooth motion, and a quality level higher than any flight stick on the market (it's mostly metal). The bad features start with it's price and end with application. You can use this HOTAS for a flight sim, but considering the strength of the Joystick centering spring, it is not an easy stick to move requiring considerable arm strength to manipulate. While this is very desirable for a flight sim like DCS, BMS or others, it makes it very difficult to use in any other PC game. From War Thunder to Elite: Dangerous or even BF2: Project Reality or BF4 or BF1, joystick movements are rapid and to the extent of the pitch/roll and then back again to counter and so on. Doing this with a TM Warthog would get tiring very fast, and the HOTAS gets bad marks for the number of applications a person would use it for (i.e. only flight simulators). Finally, it is very large. Like, huge. I looked deeply into buying a better HOTAS than I have and spent countless hours reading and watching videos and comparisions of products. Plenty of them take up desk space, but the TM Warthog is in it's own class of size. I used cardboard to cut out rectangles the size of the two units to see where they could sit on my desk, or if I could make some stands I could move around and how big the would be - they were just too large to fit in my current setup, and even if I attached them only when I wanted to fly a sim, I'd still barely be able to fit them my small desk. Consider that space requirement, and the space requirement you'll need for rudder pedals.
The X-55 Rhino is an overpriced younger brother to the other high end Saitek HOTAS systems lacking all the cool features of the slightly more expensive entries in the lineup like force sensing or force feedback and still sticks us with that annoying ergo-styled throttle even if it does have a fighter jet stick that is very close to the 1:1 modeling of the F-16/A-10 flight stick complete with the CMS Hat near where the thumb rests on the stick and pinky button and pinky "flying" paddle . If I were gonna go for the Saitek high end line, I would avoid the Rhino and go for the Saitek X-65F Pro Flight Controller instead. It features a force sensing stick which is similar to the way the "fly-by-wire side stick" works on the F-16, where it does not move but senses the force applied to it. Of course, this is a matter of opinion - some might prefer movement, others might prefer the force feedback sticks. All of these entries are pricey though, and require rudder pedals as few if any of them twist for rudder axes.
The F-16 flight stick inspired the A-10C flight stick, and so they are nearly identical - this makes TM Warthog very easy to translate to Falcon sim flight, even though the throttle is different. Thrustmaster did make a Falcon HOTAS, called the Thrustmaster Cougar, and they are still floating around ebay and the likes, but they are not plug and play like sticks made today, and you'd need to do fair research and careful purchasing to ensure it works - caviat emptor.
It's worth noting that CH Products makes some affordably priced sim controllers. You can tell why they cost a little less from the pictures, all plastic, and not always 1:1 modeling. The CH Products rudder pedals in particular look a little odd, but I hear they feel pretty good, even when compared to some of the current models. The rudders on the market used to be better - so these days, it's gonna come down to your personal preference. The best was the metal Saitek Pro Flight Combat Rudder Pedals and though once in awhile people had issues with the tension cap in the middle, they had the form and function that keeps them at twice the price if you can find them these days on ebay. The Thrustmaster Elite rudder pedals were pretty cool, in that they looked wide enough to have a center cockpit console between your legs - these days, the TM rudder pedals look closer together than the gas and brake pedals in my car. So, that is what you have to deal with nowadays - too close rudder pedals. Get what suits you, do your research.
I'm a dedicated sim player who has several hundred hours in an F-16, an A-10C, and civi crap in FSX. I don't fly as often as I'd like to for reasons and other reasons as well, but my point is I'm hooked and know I'm gonna fly off and on - making a huge investment in gear should be appropriate in that regard. Make sure you are dedicated before you buy some flight sim HOTAS that cannot be easily used in other PC games you may own.
For some people just getting into all this stuff, I would recommend getting a Saitek X-52 (or the X-52 Pro). Difference is negligible between the two, different materials/sensors - I use the non-Pro, works well after 6 years, but it lacks the total number of buttons and I have to use shift-states which can get complicated. A note about Saitek - they sometimes have a "mouse stick" and if you have any problems with the stick or your mouse, it will need to be disabled. Some people have no issues, others like me have a cursor that streams to one side and never stops until unplugged or disabled - also, their programming software is shit, but some people have had success.
But if you can afford it, and you have the space, the TM Warthog and some rudder pedals you like would be a very great interface for several PC sims.