I have gatorskins on the bikes with 28s and love them. I rode over all kinds of goatheads in the SW, and they've been good with glass/road debris in Philly.

The main commuter has 32s at the moment, and I listened to the bike shop guy and put Panasonic RibMo's on it--I had never gone above 28s so wasn't sure what my options were, and I was fed up with the stock tires and not willing to wait on marathons. BAD IDEA. This shop is staffed by a couple great mechanics and a bunch of college kids.....I'd had issues with the non-mechanic guys before and I should've gone with my gut and waited on marathons.

The RibMo's are horrendous on anything other than clean pavement, <1" of fairly compact sand/flood debris on the MUP was not good and I've had a few other interesting moments. Thankfully they're also not wearing very well, I've got maybe 3000 miles on them and I've gotten a couple flats lately that are related to tread wear in the middle of the tire, so my springtime treat will be a new set of marathons (after the marathon winters come off...).