I am going to be doing a 300 mile four day tour of the Katy Trail this year with some friends. I currently have a Trek 3700 MTB and Trek 7100 hybrid. The mtb currently has the stock knobbies on it but I plan on getting some kevlar inverted slicks put on it. I know that both bikes will be ample enough to carry my gear and for the trail conditions. Which bike would you choose to take and why? I am still trying to figure out which one I will use. Throw out what you guys might think are pros and cons of each one.