You're in the same position DW and I are in. I was all set for a MH, then started looking at the 5th wheels and now I'm not sure what to get. We won't be full timing, but we will be spending a month or two in the same area escaping the winters, or at least that's the plan. Both offer big benefits over the other and they both have their negatives. I've never driven either so I don't know if ones easier than the other to drive. I've read a lot about chucking issues that are pretty standard with fivers, but it looks like you can take care of most of that with the proper setup. On the MH front everyone says DP, but my price range is gas units. Good thing I have till next year to decide what we're going to do. Although it looks like the research that's available here and is invaluable will take most of that time.
Happy Camping All!