I have pretty much narrowed it down to a Specialized Hardrock 29'er. I already have a road bike but dont want to use it for commuting. I have a 5 mi ride to work pretty flat but some REALLY bad roads on the way (condition wise). The bike will also be used for light off road and riding with kids. Im 602 260 and wouldnt feel comfortable loading down my road bike with a bunch of work gear. I

Any opinions on whether a 29er would be a good or bad commuter for this type of use? The only accessories I would be looking to add are a rear rack and some lights. Will I have trouble finding racks for a 29er or is that not really and issue? It looks like the hardrock has eyelets for a rack though I could be wrong. Anything else Im forgetting in considering this for a commuter?