Awesome plans man!!
It's great to hear when someone does a lil of their own research. Thats what makes this site superior to the O/S.
You will definitely be happy once you get your build started. I must say I absolutely love the ride now and can go a lot more places with it now.
As far as 17" rims that will work just fine, there are a bunch of people with them on this site. It's more so they 18" plus wheels that we steer away from offroad-wise. I'm not sure if the guy is still on eBay with the really good deal on BFG M/T's but they are something to look for once you get started. (Thats where a few of the guys here got their tires from) and from what I've heard are very happy and it is a steal.
Also the G80 is a very good idea to swap over too. Very helpful offroad.
But welcome, and look around for some great ideas from the experts here...