I'm sticking with what I already have:
http://www.adventuremedicalkits.c...;catname=Shelter&prodname=SOL Thermal Bivvy
After looking at countless surplus sites and outdoor companies I think the best bang for buck is still this Adven.Med. Sol 2.0. I got mine for less than $30 and its waterproof and windproof. At higher elevations (9K'+) who needs a mesh, no-seeum setup anyway? Bring the tarp and that will make a emerg. rain cover.