Welcome tebrock to irv2.
Can't help you with a DP have only had Gas coach's in my lifetime. If you going to eventually go full time the DP may be the way to go if you have the cash and need room and going to pull a tow.
The Gas coach can do the same so my advice would be to go to dealer and drive the both and compare and try different dealer motor coach's.
This link will
give you a start on what to look for on coach you decide on and comparing between different type coach's that may interest you.
If you click on Quick Tips link
you will get into the Newmar forum top line and all the other motor home MFG's you can post in down the line on irv2.
Good luck in your quest and welcome to RVing.