I've been using a trunk mount rack for my civic and I'd like to step up to a roof rack system. My buddy gave me a yakima fairing and crossbars, so I need the towers and the actual top part (not sure what it's called).

Looking at Yakimas website I see that they offer 9 different types of tops. I am riding a Specialized rockhopper right now, but I plan on purchasing a roadbike or commuter bike in the near future, as well.

I like the idea of not having to remove the front tire on the High Roller, King Cobra, or Raptor, but not sure if there are any cons to those type systems.

Opinions, advice?