Since ours are almost the same, except for a few years, here is a quick list of my favorite mods and gotchas.
My very favorite mod is that I had a new battery box put on and installed four large batteries and an inverter. Sure is nice to have 110v all the time. I also added a Xantrax LinkPro Battery Monitor so I can see what's going on with those batteries.
My number one gotcha is the main room slide. I loaded all my tools into one of the dinette bench seats and the next time I put the slide out it tore a big rip in the kitchen linolium. I still haven't fixed that.
My number one buy was a cradle point router and a verizon USB internet stick for it. With this everything in the motorhome has internet pretty much all the time. Which is very nice. And I can plug my vonage box right into it and take my home phone with me where ever I go.
The thing I like the least about mine (other than paying for fuel) is how loud it is when I'm driving it. I've just started on a project to cover the underside of the dog house and the whole cab area with three layers of noise proofing material. More on that in some future post.
Most of what I've done is captured in posts on this forum.