You want 5.25" BS, not 4.75" BS.

The stock rims are fine....you probably have 15x7's as it is (Or 16x7's)...if they are the 15" rims, keep them.

With the stock rims, you can fit the largest tires...with a 2" BL, you could get 33's on there with plastic trimming. (People are running 32's with no BL or SL, just trimming...)

(If you get less BS'd rims, the tires will hit the fenders)

Some people have painted the stock rims when they wanted a different look, and been pretty happy with the results.

I'm running 33x12.5's on stock rims now, with 2" BL/3" SL...but its the BL that does most of the clearance work where tire stuffage is involved.