I am purchasing a 29er but my two local bike shops are telling me two different stories. I am 6'3" with a 35" inseam and Store #1 is telling me to get a 23" while Store #2 is telling me to buy a 21". I will be using this bike for fast/crazy single track in the summer and will use it as my commuter in the winter. Store #1's argument is that if I am commuting on it I want a 23" frame because it will fit perfect and Store #2's argument is that a 23" frame will be too big and sloppy. The problem is that neither have a 23" 29er in stock . The 21" at both stores feels great but for a long commute I have no idea how much I will love or hate the smaller bike.
Suggestions? Ideas? Opinions?