i'm rolling schwalbe marathon winters on my winter beast right now, but over the past 18 months of flat-free riding i've regularly ridden 3 different bikes with different tire sets - ritchey tom slicks, vittoria rubino pro III's (2 sets), and conty sport contacts.

however, the carpet tack i rolled over would have gone through any conventional bike tire, even a marathon plus. slime or tire liners would have been the only things that might have stopped it, but i ain't gonna start rolling with slime or liners (too much added weight).