Well, I've got a 700X38C Kenda (doesn't have a model name on it) and an IRC Grip Glide on the rear of my commuter. I like the Kenda a lot, but the rubber is really soft - after about 2500 miles, it's mostly bald in the middle.

{img]http://sultanofschwag.com/images/bikes0309/P3160029.jpg[/img]

That's a grip glide...weird design. ETA: since that one is on the rear, the bike tends to squirm a bit under heavy cornering - even with 90 psi!