A few weeks ago my LBS told me that the Specialized demo trailer was going to be at a popular mt. biking location so we went to check out a few of the 2008 models on actual trails. I test rode their 15" carbon full suspension bike and bit it around a hair pin turn. Ended up tearing my hamstring (ouch!) as I tried to break my fall. After that crash, I realized that smaller was probably better for me. I ended up buying the 15" WSD Specialized Rockhopper Comp. I think what was hanging me up on the sizing issue is I kept wanting the mt. bike to feel like my road bike and felt like I should be more streched out. I think this will be a good fit for me and will work fine for the type of riding we are doing. My 13 year old daughter who is about my size is already asking to ride it.

thanks for all the advice. It was really helpful in making my decision.