adding xeons are not worth the cost or the hassle.
as far as an AT tire, the geolander AT/S is about the only all terrain option from most retailers I've seen in the 225/67-17 size. If I was going to spend the money, and go with a off road look, I would be 15" rims. your tire options open up significantly. just look at the options for a 235/75-15 at tire rack or discount tire.
2012 FDII Patriot
Mods: 245/65-17 Falken Rocky Mountain ATS, RRO lift
http://goo.gl/h3lf9 - youtube channel.