I've got a pair of Marathon Supreme folders on my tourer and they run well and smooth. The previous tyres were so difficult to get on and off that any puncture was a nightmare. I'd rather run a slightly greater risk of a puncture but an easy fix than worry about a puncture on the old wire-rimmed tyres. And, of course, not being worried about getting a puncture means they haven't punctured yet! I like them.I've not tried them personally but how about Schwalbe Marathon Racer, available in 30mm: http://www.schwalbe.com/gb/tour-reader/marathon-racer.html or Marathon Supreme http://www.schwalbe.com/gb/tour-reader/marathon-supreme.html which is available as a 28 or a 32mm. All less than 400g a piece (manufacturers data ).
Was thinking of these for my own bike to try and save a bit of weight