I have a PA 12, Outback, Outback Tandem, and two Revolution 13s. If I had to choose between the Outback and Revolution that I would be cartopping I would have picked the Revolution hands down. It's light, fits in cradles perfectly, and has all the space you really need.
Then again I don't bring the sink when I fish.
Let us know how you like it after about a month of lifting it onto your vehicle after a long day.
So far car topping is appearing very manageable with the Outback and I have a fairly tall vehicle, 2010 Toyota 4Runner. A few things I am doing make it work.
I am car topping it upside down, flat on Thule bars, so I don't have to "wrangle" it into cradles. I also installed a cool devise, the Thule Outrigger II. Fits inside the Thule bar when not in use and quickly slide out when needed. With that devise, I just pick up the front of the Outback, set it on the outrigger, then pick up the back and slide it onto the bars. I have to work it back and forth a bit but that's pretty much it. One thing with this setup is that the deck needs to be a clear a possible. Anything sticking up can really get in the way. I even removed the rod holder covers because they and their screws were getting in the way. With the trays on the outback, I can mount things like Ram balls and GearTrac in them keeping all attachment points below the deck.
I figure worst case, I'll just buy a Hullavator, but so far this is clean, easy and simple.
I finally got the kayak out for the first time and I had my two girls (3 and
in the back of the Outback going for a ride! I don't think they would have fit in the Revos.