Buy a 2nd hand G25, an RGT Pro (Thrustmaster), 2nd hand G27 perhaps and the Ferrari F430 thrustmasters I know personally are VERY poor quality, and I'm not the only one, a friend of mine, -=sb=- said that it was broken within a week.
For the love of god, don't do it.
so, to recap
Used G27, DFP, DFGP, G27
New RGT Pro (about half the wireless scuderia price)
Joystick for a shifter ontop.