Got my bike stolen out of my back yard today. It was a middle-of-the-road mountain bike I had for 10 years and rode hard, so while I'm disappointed, it was due to replaced eventually.
So, what should I get next? My budget is no more than $400, including all the fixin's (2 hour night light, fenders, tail lights, slick tires). My commute is 9 miles each way, half on bike paths, half in urban traffic. I prefer mountain bikes as I do a tiny bit of off-road (e.g. on vacation once a year) and I ride year-round up here in Boston.