3t = ancient, no support, good luck with that
3s= good but $$$. especially if you want a beams to go rwd.
1zz is just stupid, 2zz would be better, but again good luck with that, especially tring to make it rwd..

so this leaves the 4a, great, reliable, plenty of aftermarket. seams like the weiner to me.. but all these motors are great becasue they are toyota. the 4a is just the best.