I commend your choice of 5er for your family situation. We have a Coachmen Chaparral 360IBL, a 40' mid bunk, which works for us as the 'bunkie' will be turned into a craft/computer room by removing the bunks. The Sandpiper you have your eyes on is a better choice as a tv room, as it has a couch.
The other thing I notice is that the living room tv is opposite the cooking area, not on the same side. The 'chef' can watch the 6:00 news while preparing dinner, something we never thought of when we bought the Chaparral.
I did a LOT of research on pricing. For Sandpipers, be sure to check out Holman RV (
Click here for Holman) in the Cincinnati area and RV Wholesalers (
Click here -RVW) near Dayton, Ohio. Many from far and wide have said best prices and worth the trip.
Best of luck and enjoy!!