I have a Wenonah Wilderness, and I paddle it with a double blade...  I started with a 60" Bending Brandes Beavertail that I use in my tandem.  I was overpowering the canoe with that particular paddle, unless I dropped  my stroke count and paddled easy.  I then purchased a Bending Branches 7 Degree bent shaft, and loved it, although I could still over power and have problems tracking if I got in a hurry.  The first time I tried the Double Blade, I had problems with it, but then at first my Wilderness was tippy too!  I finally overcame it, and have used it paddling many miles on local creeks, rivers, and rapids.  I have also paddled it a lot on open lakes with ease, once you get use to the motion of the stroke it is easy to pace yourself and stay on course, you can also go fast with it when you need to.  Right now I have been using a double that is too short simply because that  is what I have, when funds permit, I will have either one from Spring Creek or a Bending Branches 280cm canoe paddle.   I also use the double fishing with no problem.  I have yet to bring it north and solo with it, but that day is coming too.  

I have used both and both have their place in paddling, depending on the person paddling...

Bruce