Love my Sig Pro
I own a 2340 and love it. When I first bought it, I thought the trigger was a little sticky, but with 1k rounds through it, it has smoothed out beautifully and is a real joy to shoot.
Comparing the Pro with the classics is a little like comparing a Camaro to a Corvette. The Corvette is faster and nicer, but then again it costs alot more. The Camaro offers almost all the goodness of the Corvette, but at a reduced price. If you have the money, but a classic, you will love it. If you don't, but a Sig Pro and you will love it too. For me, I can't think of a better polymer gun. (Sorry, don't like Glocks)