The 700R4 aren't too bad as long as they are built well, they don't take the punishment of high hp too well, but it all depends on what you have to spend. If you plan on driving it on week-ends and such, and don't care much about fuel milage, I would go with a Th 400, and possibly 3:73 for gears, depending on what size of a tire you are going to run. Stay away from 200R4's They are junk.