The two main reasons for wheel change is probably looks, and stance. If the later is the reason, which it is for me, can I just add wheel spacers?

 

IF you are ok with the diameter, u can add spacers.
Just be sure that u get quality spacers with extended studs if you are going more than 5-6 mm.
H and r makes good spacers btw.

And we already have a thread dedicated to spacers i think.

 

Because of the length of the wheel studs 1/4" or 6mm spacers are all that you can safely use to widen your stance by 1/2" (1/4" each side)
If you find a wheel with deep dish and say 55 mm offset you can use spacers that bolt to the hub and the wheels bolt to a half-inch spacer to bring the offset to 42 mm which will work but unfortunately a half-inch thick spacer is difficult to do. Anything that brings the offset below 42 mm is asking for trouble. The half-inch increase in track is more than worthwhile. And its the leat expensived.