I commute on my System Six hi-mod that I built from scratch (about 5,000 worth). I thought of going the route of a commuter but decided to just have one bike all purpose. After over a year of commutting I am sure glad I made the choice. What I did to keep it racing light was go with carbon throughout and replace all bolts with titanium. Now for a commutter its crazy light which makes for less weight to haul around.