We bought our Dutch Star new and used it full-timing for 8 years - traveling constantly. We would highly recommend Newmar.
You can add custom additions, changes or deletions as long as there are no structural changes. We had a couple minor warranty issues when we first got it but they were taken care of satisfactorily and quickly and not by our selling dealer. We had no problem using another dealer as we traveled. We didn't have to return to the manufacturer. Newmar doesn't mass produce like some manufacturers and they take care while building. We took the tour and the workers didn't rush. They kept us updated constantly as to progress of the build and asked clarification before doing special items so nothing was done incorrectly. Cabinetry was well-made with a perfect fit everywhere.
Before ordering we tried to talk to every owner we would come across and we didn't receive any negative comments. That sold us. Good luck with your choice.