We are looking to upgrade from a pop up. This one has been at the top of our list for a while now. We went to an rv show yesterday and made the mistake of sitting in the theater seats in the 2600. Now we can't decide between the 2150 and the 2600. The 2600 has a dinette and a tri-fold sofa with theater seating as an option. It is only 3 feet longer and the MSRP is only slightly higher. But the 2150 is a nice floor plan as well. The huge bathroom is nice on both.
As far as GD I think what sets them apart is the great customer service. Go to the GD owners forum and look around. Every make can have issues but people say that GD takes care of their customers. There is a guy on YouTube that had problems and the dealer screwed him so GD came out and picked up his trailer, took it to their factory, corrected everything, and brought it back to him. That speaks volumes to me. They have merged with Winnebago but no changes have been made so I would expect the same customer service.