Bowler2
I have all of them so comparing them is not much of a problem for me...
The issues that you raised about the Rainbow (also applicable to the DR) have been rectified with the 2010 versions.
http://www.tarptent.com/doublerainbow2010.html
The new pole sleeve is much larger and the cross strut now is not sewn into the fabric, so seam sealing is much easier than before.
BTW, the trick with sleeves is to point the pole downwards, that way it will not snag but slide in.
Here is a quick video tour of the new DR
http://www.youtube.com/watch?v=Gv8Mxbpc1ac
Franco
franco at tarptent dot com