Three things are going to be critical: bug protection, particularly in the early season, waterproofness, and lack of condensation on the inside of the tent. The third is not often thought of, but you can get just as wet from moisture dripping off the inside of the tent as from rain.
I've slept in a lot of tents in the past 45 years. I'm very pleased with the Alps Mystique. Not only does it fill the three criteria above, it's well-made, packs small, and is easy to set up.
Very good price here, also: http://www.cabelas.com/view-all-tent...:referralID=NA