370z Trim Packages

Shoeshear

Sport = base + better brakes, 19" wheels, spoiler, rev match, VLSD
Nismo = better brakes (same as sport I think), nismo wheels (wider front and rear), VLSD, recaro seat backs (base of seat is the same as sport and base), different exhaust, different tune (350hp instead of 332)

I think tech package adds nav and something else and touring also adds leather seats with seat heaters and stuff. Somebody will have to correct me on the details, but it's something like that.

If you just want performance, there are basically two camps, sport if you're going to do some mods, but nothing crazy, nismo if you're pretty much not going to do anything (as it basically comes with a different exhaust and tune. If you like doing things yourselves and adding your own touch (intakes, exhaust, tune, wheels, brakes, etc.), the sport is a good option. The sport has great brakes too which you can upgrade if you get really serious (to a stoptech setup or something). It's basically a wash, and the real decision here is to get what you want.

The nismos were a bit on the higher end of what I could afford, so I preferred a low mile sport that I could modify as I desired over a longer time period (keeping it fresh/interesting to me). My 2 cents.