I decided that I wanted a big basha to accommodate my two (only
) friends too. After a long search I bought a Hilleberg Tarp 10 XP
http://www.hilleberg.com/Catalog/tarp_10_xp_2038988.htm, made of silicone coated polyester.
It is very light and compresses very small, but when opened out is GINORMOUS (3.5 x 3 m / 11.5 x 10 ft)!
No worries of your feet wiggling out during the night. It's like a hotel! I would have liked a central loop, but the Hilleberg doesn't have one. I work around it by using a childrens soft "ball pit" ball
and a cloth tie like this:
Being on a bit of a basha-buying-spree, I also bought an Integral Designs Sil-Tarp2
http://www.integraldesigns.com/tarps-frame.htm
This is smaller, but very light and compact. I bought Hilleberg line-runners and guy line to use with it.