I used some 35mm Hypers on my tour of Iceland last year. They were most excellent. The only downside was that in a fit of cautiousness I took along a spare tyre, which I never used and was therefore pointless. They even handled some offroading with aplomb.
Marathon Supreme vs. Vittoria Hyper?
I see there's Hypers in 38mm for £20 at PX. They've gotta be worth a punt for my Tripster yeah?