Pretty much anything over 330-350hp on an auto tranny its gunna need to be built... They're fun, but not like slammin through gears... My last supra was 330hp on an auto, my current one is a 5sp and a "weeeee" bit more power... Comparing the two experiences, 5 speed v/s auto, I love the 5 speed more... Luckily, you livr in Tampa where there are quite a few really knowledgable MKIII guys, and gals, lol, I wont leave out Kelly, she knows her shit... So, if you ever decide to go 5 speed, you'll have alot of help and know how behind you...