Maybe we have a different idea of what a commuter bike is. If a commuter is cheaper than a sub 1800 gram set of wheels, then, sure, the the commuter makes more sense. Where I live most people are commuting on $600 bikes or the Colnago they raced 20 years ago.
And I did not advise buying an "aero" bike, I advised for a bike that one could get aero on. I just don't believe extended-steerer "comfort racers" like the Giant OCR, Trek Pilot, and Specialized Roubaix meet that criterion. My advice is that if one is interested in competition and can get comfortable on a competition geometry without the adaptation, then one should get his torso out of the air flow and ride a competition frame. And one doesn't have to spend $5000 to get a competition geometry. From the original poster's list, I like Trek 1500, especially since it should be heavily discounted. If he's looking at Giant, then I'd recommend a TCR Alliance over an OCR. Don't know much about Fujis but from the geometry charts I see that several models are relatively shorter in the top tube, which is nice if you have long legs. And then I'm really fond of my Felt F5C.
For several years in New England and Colorado, I commuted on the bike that I raced and never felt compelled to raise the handlebar 3cm. My only adaptation was to throw on a set of reliable clinchers with a larger freewheel cluster.