i hear ya on the 150 part. imho, i think used is the way to go. for me, unless it's my carpet machine that won't get scratched, i'll save some money by letting someone else scratch it for me.
and like you, i too need to build it myself. so i end up with the car in pieces hours after it arrives. if you insist on going new, then
- tc3 racer w/ rpm front bumper upgrade.
- xxx-s standard (if it's really avail for $129)
- or that yok if it's cheap. heck, you could get another one used just for back up parts if your lhs doesn't stock them. you'd still be under $250 total.
good luck. making the decision on a new car is a good time. have fun.