I'm sort of in the same boat. Out here winter means flat, brown fields all the way to the horizon in all directions. It gets depressing.

I was thinking my next lens would be the Sigma 35mm f1.4, but the more I think about it, the less I think I'd use it often enough to justify the cost. I've also been looking at the 100mm f2.8L macro. But again, not sure I'd use that very often either. What I'd really like is a looooong lens, but there's no way I could afford the fast IS versions. The 400mm f5.6 might be doable, but again, it's a lot of dough for a limited use lens.

I need another vacation, I think.