In reply to Mattyk:
North Face Mountain Marathon? I think mine was £120, and weighs about 1.2kg. I've never used it for a mountain marathon, but it's good for solo backpacking & cycle touring, and packs up pretty small. It has loads of space for 1 + gear, could fit 2 people in at a push I reckon.
It stands up pretty well in strong winds despite only having 2 guys, mainly because it lies so low to the ground. My biggest gripe with it is that you can't really cook in the porch when the flaps are closed because the sides slope in too much. Also you can't sit up in it if that's an issue for you.