I'd drop $150 on that Legnano without knowing anything more about it.

Although for L'Eroica, again with the Tire clearance that the Col. mentioned. Those are probably about as big as you can go on that frame...then again the tires on there aren't horribly skinny.

Personally I'd still want more clearance for fatter tires, but I tend towards fatter tires as it is. If you're used to riding 23's this might be comfy enough for you.