My latest 1 person shelter is a Locus Gear Hapi in DCF, but it's actually big enough for two and only weighs 17 oz. including stakes. My previous 1 person was a Mountain Laurel Designs SoloMid, also DCF. It was a great little shelter as well, but it was a fair amount smaller then the Hapi and only 1 oz. lighter.
Pros: Super light wt., handles wind very well, and DCF doesn't stretch or sag in wet/windy conditions like silnylon.
Cons: Expensive, expensive, expensive, and not as abrasion resistant as sil. Oh, and it's expensive.
It's also floorless, so that can be a pro or con depending on how you feel about floorless shelters.