check out the clydes and athena's forum. I think any good touring bicycle would have no problem with that sort of load. There are plenty of them out there... Surly Long Haul Trucker (LHT), Jamis Aurora, Trek 520, Rocky Mountain Sherpa 30 (my favorite), Cannondale makes touring bike, Fuji Touring and I'm sure there are many others. The touring bikes are much more comfortable than road bikes (racing type of bicycles) and they make a great commuting cycle. 400 lbs... no worries. Just get a good set of 36 spoke wheels and you're good to go.