For base S14s and all S13s, lug pattern is 4 by 114.3. Offset can be as high as +42 (will look like the wheels are tucked inside the body of the car), and as low as probably +20 or so for a 7" rim.
I personally like the more 'flush' look, and would go with something in the +30 to +35mm zone.
Also, try
http://www.forperformance.com/ I was just at their site and seem to have some good stuff.