I have a trek 4300 that came with some knobby bontrager jones'. I'm looking to put something a little more street/bike path friendly, with the occasional packed singletrack. I am commuting a little more to work these days. Trying to avoid destroying good tires on pavement. The intermittent slide-outs aren't as fun as they look. Want a good comfortable tire that can get little dirty too. Any recommendations will be appreciated.