In reply to hoffy: I've got a mountain marathon. Their very good for the price. Lived in it for a month in the Rockies. Can accomadate 2 close friends, I did I 5 night crossing of Snowdonia from South to North September before last with my girlfriend and it ws fine.
The only problem is you can't sit up in it (and I'm pretty small) so if its raining your gonna have to cook and eat outside.
Very stable in winds as its soo low. I've only every needed to pitch it on 3 pegs as well which saves weight.