Hmm all of tho's above are good choices, but i myself going into drifting for the first time went out with a 4WD vehicle, Just so i could get the whole drifting concept down,it helped me allot until it was easy with the 4WD then i went to a slightly modded RX-7(fc) and slowly added more power when i was able to control the car well with the amount i had then,And never looked back!
Hope that helps some.
Joe.
oh crap, I see aaro11 has beaten me to it. Well, then I'd have to recommend the Nissan Silvia S15 Spec-R. Forget which parts you need, though, so check the GT3 drift settings depot.