If you want the latest, order one made to your specs. Then you should get the E-450, and mid-year improvements, if any. You might consider the delivery cost to Arizona, we saved almost $2,000 by picking ours up closer to the factory instead of to Florida dealers. I also put in a better ceiling fan with remote for less money.
We are quite happy with our 2016 Vegas 25.2, and would consider the 25.3. Happy hunting!
I think we need to stop calling it "working from home" and start calling it "living at work!"