We have a 2009 3055RL and absolutely love it. Did it have a few problems? Sure, but then again so did our non-movable house. In fact, ours is at the dealership getting a bunch of deficiencies fixed as I type this. Can't wait to have her back, and my 9 year old is begging for us to go out in it next weekend. Cool, we've never gone "camping" in December in Canada before.
I think the big benefits to the BigHorn that you'll notice are definitely an upgrade in the insulation, and the overall quality of everything in it.
Cheers,
Chris