If I were you I would get the 285/75-16 MASTERCRAFT COURSER MTs. The rims you have already will look pretty sweet with some 285 wide tires, and surprisingly the 285 tires are really not going to stick out much further than the 9" rim (around 1" more). With a 9" rim and -19 offset you are looking at 4.25" backspacing, and my 8.5" rims with a +15 offset have a little over a 5.25" backspacing. So yes your RIMS stick out over 1" more than mine, but since you are looking at 285 tires (11" wide roughly) and I have 12.5" wide tires you tires will probably only stick out about 3/4" more than mine. I think you will be close to in the ballpark with the 285s on the current rims you have. It would not be my 1st choice, but considering you already have the rims I would at least try to 285s out for a while, I think it will grow on you and you will like it. If you were however throwing some 12.5" tires on there I would say no way. I gave you all the comparisons so you could compare and visualize using some of my photos if you want, here is one thread that might help in the visualization area:
http://www.vehicross.info/forums/sho...ht=rims&page=3