I've had my 2006 Chrysler Crossfire Limited Coupe for a little over a year. I went through last winter ignorantly with my stock summer tires and it was miserable. Easily the worst car I've ever driven during the snow. That being said, it was my fault for driving with the summer tires.

So, yesterday I went "snow tire shopping". I was quoted anywhere from 1200-1600 bucks for some Blizzak's +installation. I went to Tirerack.com and found 2x types of tires: Bridgestone Blizzak's AND Dunlop SP Winter Sport 3D.

So, which should I chose?

2nd question. I'm keeping the same rims because of some curb scrapes on 3 of the rims from my last winter debacle and plan on replacing those in the spring. That being said, tirerack.com recommended different tire sizes for snow tires: 225/40-18 for the front and 225/45-18 for the rear. Would the rear tires fit the original wheels? I know that you can add something and subtract something from the size and still fit a tire on the rim, but I'm confused.