Are the 2013 voltage any better than the 2011/2012's ?

I am currently in the process of buying a 2013 Voltage 3895 epic 1&2, all weather, garage package, luxury package, 12 CF refrigerator, I made a deal for $75K out the door just wondering what some opinions or on this price? Pretty new to the RV world, but it seems to be a good deal. This unit doesn't have the dual pane windows any opinions on how much of a difference these make in subzero temps.