In reply to 3leggeddog:
I reviewed an Arctryx one a few winters back
http://www.ukclimbing.com/gear/review.php?id=5228 so know what they are like. Last year I reviewed the Leaf from Edelrid
http://www.ukclimbing.com/gear/review.php?id=7449 and its really good, virtually as light as the Arctryx ones, quite a lot cheaper, and just works well. I've been using it for almost everything for the best part of year now and its going strong. Mainly using it as I'm very lazy and it's super light and takes up very little space in pack. Well worth looking at.
Did you see the Camp one that had a advertised here on UKC the other day?
http://www.ukclimbing.com/gear/news.php?id=7533 Looked very light and wasn't too expensive either. In fact I will ask UKC if anyone is reviewing one, because if not I'd like to try.