Mirror slap survivor
Join Date: Apr 2005
Location: Sunny Florida
Bikes: Gunnar Sport, Surly Pacer, Access MTB, Ibex Corrida, one day a Simple City
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You can correct for top tube length by swapping the stem. Your issue with a 30 inch inseam will be standover height. I'm 5'6" with a 29 inch inseam and my bikes are all 52cm. Two are standard geometry and one is semi-compact. On the standards, my crotch touches the top tube. On the other, it doesn't. A larger bike would be difficult, if not impossible, to straddle at stoplights.
I don't think a 58cm will fit you, but it all depends on the frameset.