I have a 2013 Sunseeker 3100 so I'm biased but I went through all the brands prior to deciding on it.
This is a no brainer in my opinion.
Sunseeker hands down.
The fiberglass roof times whatever number we're up to now (lost track).
Another huge factor was Azdel walls. Google RV Azdel walls if you need more info. When we bought ours, only two brands offered both a fiberglass roof & Azdel walls. Those two were Forest River (Sunseeker or Forester) & Nexus. At the end of the day, we really only considered those two brands. Given our limited use (1 week long trip plus 8 to 10 weekend trips a year), Sunseeker won out over Nexus based on a bang for the buck comparison. I believe Nexus is a great product, don't get me wrong. But it costs more. And for our limited use, I didn't feel it was worth the extra price.
As for dealer, another shout out for RVDirect dot com. We bought ours at their Buffalo NY location & saved a lot versus a nearby dealer. The nearby dealer had a great price but they were still a few thousand dollars higher than RVDirect. By the way, because I'm sure it will come up, we had no problem getting warranty service. But its something to consider as your experience could be different I suppose. Worst case, from SE Michigan (I'm a former suburban Detroit guy by the way), you drive it to Elkhart, IN (Northern IN) for the factory to work on it. But it really won't come to that.
Good luck & keep us posted.