Looks good. I'm with you on 18" being big enough. I had a G35 coupe before I got my GT and I vowed never to own rims bigger than 18" ever again (The G had 19" rims). I'm through paying that much for tires. I'm keeping my 17's for now, though I'd really like to find som 17x10.5's for the rear...
Did you get a nice even drop on both sides of the car with those springs? I wouldnt mind lowering my car just a little, but I don't want to slam it. I had a big drop on my 98 SS and it just wasn't worth it...