I have Schwalbe Marathon folders. I forget the exact model but they've served me well, over a 2000 mile summer tour on all sorts of surfaces. Also, if you're not an idiot and avoid riding over every shard of glass you see, flats are less of a problem...that being said, I had one flat. Not too bad, and I think it was because of these thorny little thistles that gave me a slow leak. Also, I have 700x32, pretty comfy. Although, I heard I lose some speed with it. Reflective walls are a definite winter plus.