;)Congrats, Doneworking!
We lived in OKC for 10 years and moved to Hurst, Texas, in 2000. Over the years we have had a number of vans, campers, and motorhomes, and are now on our third PC. We started with a 2400, went on to a 2551, and in February of this year we went to Elkhart to pick up our new 2552. Kermit is the greatest guy to work with and a neat person once you get used to his dry sense of humor.
Gas mileage has always been a concern since we regularly pull a fully enclosed trailer rather than towing a vehicle. Yes, pulling a trailer can be a hassle, but we can back-up and Kermit installed an additional camera on the trailer for us. Neat!
The E350 in the 2400 did OK, but the E450 is really much better. We had the Roadmaster system and Bilstein shocks installed on both the 2400 and the 2551 and it really improved the handling, particularly in strong crosswinds. The 2013 chassis already had beefier sway bars and better shocks so we did not see the need to add those. We did add the Banks system to the 2551 for $3400.00 and got about a half mile to the gallon improvement and some better mountain performance. The 2013 seems to have about the same performance as the 2009. We can get over 9 mpg without the trailer, but 7 is about the best we can do pulling the 8,000 lbs trailer with the Jeep inside. I am looking into a diesel conversion from a company in Montana and would love to see the Cummins 5.9 Liter engine in this chassis.
You will enjoy the PC and if you haven't already been there, you should go to Elkhart and meet Kermit and the office boss, Karen. They are terrific people and we have enjoyed visiting with them. PC owners are a good group and are willing to offer advice and help if possible. And all of us love showing our PC, especially the little modifications we manage to talk Kermit into doing for us.