I went with the Continental PureContact with EcoPlus Technology in a 205/55R16. The listed treadwidth for that tire is 7.6 inches. They look a little streched but not bad and they keep me at the same weight as the orginal 15".The next size 215/55r16 has a 8" treadwidth and only slightly larger diameter, but has a XL load rating which I figured would effect the ride adversely.
I picked a set of these up yesterday. Excited to throw them on and then switch them over to my 17's in late spring. I will post pics of both in the near future.