Go ahead and give it a spin since bike frames are, to say the least, not standard due to differences in geometries. I'm 6'3" and have found that I fit comfortably on 56cm, 60cm, 55cm, 61cm, and 59cm frames some by the same manufacturers. You'll know it's too big the second you try to straddle the top tube.
Just got back from a test ride. It's big, though not as bad as I thought it'd be, but when I'm on the bike, it's fine. They are going to put it on Craigslist if I don't take it and would ask 800 for it but it sounds like they'd sell it to me for $600. I think it would be tough to find anything at that price for this quality.
