Help with wheel choice 15" or 17"

Even though most ole school'ers dont like the "bling"..

I don't mind the "bling" at all, it's the rubber band looking tires that go with big wheels. The roads around here suck, and the side wall of the tire absorbs (or doesn't) a lot of the impact of bumps, cracks and pot holes.

Here is a pic of my new rear wheels and tires. Wheels are billet, so they are light and polished so they are shiny. Tires are the biggest you can fit without fully tubbing.