Originally posted by Diabolik
Plus if you want to upgrade your brakes to say a Brembo, AEM, or a Wilwood brake kit, you can't use a 16", it's too small. At least according to their respective web sites.
The stock brakes with good pads are more than fine for everything except serious road racing use. Any sort of big brake kit is overkill and won't stop you any faster with the amount of traction provided by street tires.
The Wilwood kit fits under 16" SSR Competitions which you are into. I hate to reference SCC but their project EG Civic has both 16" Competitions and the Wilwood brake kit.
Look at the tire size, you can see that it's 205/45-16.
Fastbrakes sells a kit using 11" rotors and a Wilwood 4-piston caliper which fits under most 15" wheels.
No matter how light any given wheel is, the 16" version is going to be lighter than the 17" version. But whatever, while I feel that 16" are the quasi-ideal size, 17" wheels aren't going to make your car blow up and spray itself in a million pieces all over the road.