For a puncture resistant smooth roller 700s: wire Gatorskins #1 favorite, K. Bontrager's xlite Hardcase #2, ..., and bringing up the rear Schwalbe M Supremes DNF. I felt lucky to dump the SMSs on eBay for close to what I paid, I think the Marathon line is THE most overrated, and on average the heaviest.

I will say this year on the pacific coast seems the worst, all the rain in the spring has generated an endless supply of thorn-like junk on the roads and our small government road maintenance is pretty terrible. It's the year of flats.

Not to sound like Schwalbe hater, SMSs on my 26" tourer have been good, and my sprinter rocks R.1's. (Favorite still has to be GP4000 black chilli, for the right bike and a good road).