After I did the 1" coil spacers last year (plus adding 235 / 75 - 15's) the wheels rubbed ferociously against the frame when turning. Sounded like a hacksaw (albeit a rubber one). The 1" wheel spacers helped a lot. Now, unless I am absolutely full-locked-turning (usually in reverse) there is no rubbing. When fully-locked-turned, I hear a little rubbing (probably against the body, never checked) but its so mnior its not worth looking at.
The wheel spacers did make an added difference in handling though. I would have preferred wider wheels with correct offet/backspacing.