We have owned a Cougar and were very happy with it, then we had to have something bigger. Anyway the Cougar stood up well and we had no issues during our ownership of it.
Personal opinion of the Rockwoods is not very good. Have looked at lots when shopping for our units and they just seemed lower quality than the Cougars. Many Rockwoods have issues just sitting on the lots never mind taking them down the road. Don't know if was just our luck to notice the issues, but our impressions have never been very good on them.
Good luck on your shopping, I'm sure you'll find a perfect unit.