I think the RV's are very close to each other. I would lean maybe towards Grand Design based on forum stories of better customer service.
The dealer is the deal breaker. There is a huge dealer in Texas that has stores in Katy, League City, Willis, Mesquite,and El Paso. They are good at sales but my experience is they are incompetent at service. If you get a decent price from them, plan on terrible service under warranty. After warranty I found a long established RV service only shop to repair mine.
Just me, but for the money you spend on a new 5th you can get a used better heavier built DRV, Landmark, etc. That's my next move, if there is one.