I would say the X-55 with rudder pedals. X-55 has more switches and knobs to map then the Warthog, and it's cheaper. You can use the difference in price to pick up some Saitek combat pedals.
Also, the X-55 uses the same Hall sensors.
Having owned an X-55 and a Warthog, I would not recommend the X-55 to anyone who wasn't dead-set on twist-yaw. I simply am not that impressed with the build quality when the Warthog is available.
Sadly the CH setup is really expensive. You will pay through the nose for it. They hold their value immensely well, too- even on ebay, they are a fair percentage of new price, often. Amazon would be a reasonable bet, if you can't find a specialist sim supplies vendor in your country who can beat them. It is, however, really good quality, and reliable. Having used their stuff, I have to say that if I knew then what I know now, I would have bought the CH kit instead of my X-55. Buy cheap, but twice.
That said, my X-55 is really nice, and I have it running smoothly now, subject to the tweaking alluded to above. I quite like the programming software, and the massive number of extra switches and things on the throttle are a godsend. It's not a terrible option. I'd be a bit wary of the X-52 and X-52 pro, which are a bit more flimsy, though. Oh, and while the X-55 stick has a yaw twist (unlike the CH stick and the Warthog), I ended up adding pedals anyway- it's just nicer.
Realistically, I'd suggest
CH stick/throttle/pedals (if money was no object)
X-55/pedals (slightly cheaper, reasonable)
Warthog/pedals (expensive, nicely built, a few niggles, but impressive. Great feel, some people go mad for it)
T1600M plus CH Pro Throttle (cheaper but usable stick, solid throttle- good slightly cheaper option)
Regarding rudder pedals (if you want some), I'd avoid the Saitek pedals. The uberpedals that simnuts love are the MFG Crosswinds. They cost a fortune and you have to pre-order and wait around for them, but people love them. Alternatively, the CH pedals look as boring as hell and Just Work(tm), like all their other stuff.. nice and sturdy.
Some good recommendations here. I wholeheartedly second the "avoid Saitek pedals!" warning. They are terrible. Mine (pro combat type) broke within a month of purchase, and i had to take them apart to fix them. The plastic gearing in a $180 product is terrible. My crosswinds cannot be ready soon enough (sadly will be a few months yet)!