I have a '92 GS and thinking of buying 16" rims, How much do i have to lower the car??? And what do I have to buy, what for suspension, I really do not know much about this so I don't want them to rip me off in something, Here's my car:

http://www.smaracing.com/clanovi/slike/alekss01.jpg

 

with 16's you can probably go about 2/12 all around, im 3 all around but im on 15's

 

I'm running 16's and a 1.3" drop all around, and it looks pretty good.
You'll need new springs and shocks. Cox Import has pretty good prices on KYB shocks and Eibach springs (which are both good brands), but I'm not exactly sure what they have for the G2. I got a spring/ shock setup from them for $540.