I bought the solid white case by Incase from Best Buy. It looks pretty good with the white phone. The only thing that I noticed so far is some minor discoloration. I wonder how long before it does not look nice anymore. Something to think about before you drop 30 bucks on a case.
I have 3 cases that I rotate through but the one I use the most is my white and black speck candyshell. I also have a CaseCrown chameleon slider in green and an Incase crystal raspberry slider. I like variety