I really like my Shangri-La because of the taper. The taper has some interesting advantages, including hanging the foot and head ends at different heights and when setting up as a makeshift tarp tent. I did a quick review here:
Reversed But Still Very Shangri La
The edge is a little close for the shelf on a wbbb standard, and it might a little short for an 11ft dangerbird (i am still playing with that set up.
I also have a toxaway. Nice tarp too. The cat cut on the end is a little more aggressive toward the middle (the ends of the Shangri La are flatter).
Both pack small with the shangri-la taking up slightly less room.
I asked for loops at the ridgeline so I can tie the tarp back as in a baker lean to style. I also use the loops to tie up the tarp so there is no need for snakeskins (weight and space savings).
Hope this helps.