eskimoluke

I know I run the risk of being the billionth person probably to ask, but through the search engine I did not find what I was looking for, so here goes nothing.

I am a 5"11 newbie road cycler, looking to buy a bike on a shortened budget, and because of this I have looked at bikes ranging in the 56-60cm area. Now the question is, would a 56cm bike fit me well enough, and if not (say it is too short) what would be the consequences?
(the bike in question is a specialized allez expert, 2006)
I have gone through the competitive cyclists fit calculator, and received this:
Standover Height Range 30.4 - 31.1 inches

I believe that is the only important part, and even then I doubt the calculator because it talks about mountain bikes instead of road bike fitting. My inseam is 32" almost exactly, if that is of any help.

I apologize ahead of time for the umpteenth topic on this issue, and thanks for any help I might receive.