Hello, I would say to convert your Mtn. Bike over and have some real fun with it. I am doing the same thing to my Marin Mtn. Bike and just having a blast eating up roadies that try to overtake me. Have fun and best of luck with your project.... here are some of the things I have changed on mine...

1) Hope Stem
2)Custom Seat
3)Cut Seat Post
4)Cut Bars
5)1.5 Racing Slicks
6)Rigid Forks to install over the weekend