I test-drove some today. I'm 5-10, 31" inseam. Most of the salesman thought i should use a 17.5" frame, but each time I tried a 20" I felt more comfortable. For one thing, i didn't have to raise the seat up so high. Am I missing something here, or should I go with my instincts (20"). Most of my riding will be up to 30 miles and I am not interested in "competition", meaning top performance. Also, I read about how good the Topeak Road Morph is. They don't sell them in Kentucky. Is it worth buying something else local or ordering the Road Morph G online? Thanks for any advice.