Depends on how you like your bikes. The top tube actual is almost 21", but the center front (crank center to front axle center) is 30.75", which puts you way back from the front axle. Wheelbase is long at over 46.5". Most people like a smaller bike because it whips around easier. I am almost 5'11" and run a 40mm stem and the bike is perfect. I have a 50mm stem for the 1.5 steer tube (Totem) or 1-1/8" for the Fox I could throw in that would stretch you out a bit.

Meant to add the Specialized link:

http://www.specialized.com/us/en/bc/SBCBkModel.jsp?arc=2008&spid=34366