I really like the look of the Centerline wheels and they were on my short list, but because I wanted to push the wheels and tires out a bit more I went with 16x8 Welds with the 3-5/8" backspacing.
Anyway, another tire size to consider is the 265/75R16, it is a bit taller but not enough to really affect anything. the 265/75s are an LT rated tire so they do have a stiffer sidewall.
I have to run a lift (2" with coilovers) up front with my wheels, but even then the only rubbing I got before lifting it was some rubbing on the lower bumper valence (black trim) at a full turn.
After reading what you wrote and looked at the specs, I think there may be a misunderstanding of the total affect of a wider wheel.
A 16x7 wheel with a 4.5" BS matches the factory wheel and you don't change anything. A 16x8 wheel with a 4.5" BS will move the outer edge of the wheel and tire out 1". Since the distance from the hub to the back of the wheel is the same (4.5"), the extra inch of width will be on the front side of the wheel. As you mentioned, the 16x7 wheel with the 5" backspacing could end up causing the tires to rub on either the frame or upper suspension components.
Finally, just in case you're uncertain about moving the wheel and tire out a full inch, the Ivan Stewart wheels are 16x8 with ~4.5" of BS and they fit fine on the stock trucks.
Hope this helps.
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