@Morgan: Yeah, the thumbnails being a bit blurry is an issue for me too, and I haven't found a good work-around for it yet. I don't think doing two identical photos is a great route to go, but maybe it is if it's flat work like yours. I feel like for objects, you should use all 5 photos to describe what you're selling from the most angles.
I just kind of deal with it, and hope that Etsy will figure out a better way to do our thumbnails, that won't reduce the quality so much.