Originally Posted by Adam Turman
My 2 cents is to get the cyclocross style bike. That way you have the most options for whatever kind of climate or commuting you are going to do. The wider frame allows for wider tires and you can always go with skinny.
I just bought a Bianchi San Jose set up fix for that exact reason. Now I can roll 700 x 35 studded Nokians through it.
Good luck! All those bikes you mentioned sound like fun rides.
Have to say I agree here...a cross bike with slicks (or better yet, two sets of wheeels, one knobby and one slick) would allow you to have a good, fast commute on something sturdy and then try a different kind of single track on the weekends. I use a kona JTS exactly that way, and it's amazingly versatile.