Thanks everyone. I think I will try a few WSD bikes out on trainers over the winter and see how they feel. I'm in no rush. The bike I have is working for me. I do notice when I do a lot of climbing my lower back gets sore, and I also can't reach the brakes when I'm down on the drop bars, which makes me nervous. But possibly smaller handle bars could solve that.

I've been drooling over some of the new WSD 2006 bikes on the Trek site. But, I don't want to rush into anything. Thanks again!