We bought a Grand Design in August 2020. I did a bit of research prior to pulling the trigger. I looked at 3 in particular. GD, Dutchman, and Starcraft, in that order. We drove from Brazos Co. to Rockport and bought from Camper Clinic but they have now become part of the Explore USA family. Great dealer but I'm not sure they changed with the name. The biggest thing about your dealer is service after the sale. Make no mistake, you will need service of some type.
I agree with Drillbit's specs. I drive a 1/2 ton V8 and pull a TT that shows 6,995#. It does fine, even in west Texas. This is a handy tool to use and others have come up with spreadsheets to calculate.
Towing calculatorI used this article and researched from there.
Don't buy! There are a couple in the list I might consider, however. I would have loved to bought from RV Station here locally but they didn't sell Grand Design. I've heard the dealer in Navasota is a good one also.
Good luck with your search. We take ours out at least monthly and sometimes more often.