Check out the Lautner covers (have a magnetic clasp) or the "quote" covers. (no clasp) They are a faux leather I think, but they wear pretty well and are fairly light.
Yeah Alosito, I had that cover. It was very good and functional. No unneeded things.
The recommendations sound good but I have no experience with Nook covers so can't help. Also worth checking are covers from http://oberondesign.com/
They aren't exactly what you're looking for, but they are very pretty and I've heard lots of good things about them.