First off, I like the black rims. They look really sharp against the black rig! 112000 miles isn't necessarily a bad thing. I have friends pushing 200k on their rigs. Obviously you would stay on top of oil changes, plugs, etc. but I don't see it as a reason not to do what you want to do with your rig.
As far as tires without a lift; on your rig, with a few adjustments, you should be able to fit 35s relatively easy. You can trim the flares and if it's done correctly it looks really good. You mentioned 1.5 inch spacers. Are they coil spacers or wheel spacers? If they are coils spacers then you should be fine. If you go 35s, you may need some wheel spacers to help with rubbing at full turn (unless that's what you were referring to). If you have those, then some 1 inch coil spacers, adjust the bump stops and trim the rear pinch seams. Should be fine with 35s and they will change the whole look!
I have a two door with no lift. I have 37s with 1.5 inch wheel spacers and trimmed pinch seams (I will raise it about 1.5 inches but right now it's okay).
There are other things that I would suggest if you are going to take it out on the trails hard, but I'm not sure what your plans are. Right now, I won't wheel mine hard until I beef things up underneath.
Here is how it sits now. Hope this helps!
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