Here they are mounted.

I also lowered the car myself yesterday by cutting exactly one coil off each spring. I have lowered a few cars this way with excellent results. I did use some after market springs on a Mini Cooper S and after reading everything to try to find springs that would preserve the ride I ended up disappointed. It seems that everyone that makes springs wants to "improve the handling". I liked the handling I all ready had, I just wanted it a little lower. Using the OEM spring on the Crossfire I ended up with a ride that was OEM, just a little lower.

For tire I ended up using 265x40x18 in the rear on 18x9's. The tires are 10mm wider and slightly larger around. The fronts are 225x40x18 on 18x8's. Not a bit of rubbing any where. The 265 40's on the rear give a business like meaty look and also give me pretty much unlimited choices when buying tires. The ride is also better than the stock 19's but not at all less responsive. Feels like there is a lot less unsprung weight back there!