I've been working with Matt at Red Lantern Cycles in Menlo Park.
If you are in the market for an SMP, I highly recommend him. Aside from being a very knowledgable fitter, he has almost all SMP models available and is very generous about loaning them out. So far, I've tried the Forma (which was bone-crushing stiff) and the Glider (which is a little too flat for me). If I can find an SMP that works well for me, I'll certainly buy it from him. You will pay more vs eBay, but you're supporting a local brick-and-mortar store and you'll end up with the right one before dropping your hard-earned cash (instead of the typical buy, try, sell, repeat cycle). That alone is worth A LOT.
Bob