Hi jokeane. I had the same question.
I am deciding between the Bee 2 and the Pop Wing 1200 (both are 4 ft span). I will learn sloping in rocky terrain with no landing zone. So I like a slow glider for easy catching. Also a tough glider for diving into rocks, bouncing off rocks, and cart wheeling over rocks.
The main Pop Wing thread is on http://www.rcgroups.com/forums/showthread.php?t=1428598
I am guessing that a Pop Wing 1200mm glider's wing loading would be 3.8 to 3.9 oz/sq ft (see http://www.rcgroups.com/forums/showp...&postcount=484