What size?
#1
#2
I would assume you are going with a 10 inch wide rim? The 4 5/8" (I think?) backspacing will put the edge of the tire just about flush with the edge of the fenders. If you want them to "stick out" any farther, go with the 3 5/8" backspacing. Most people running 16x10's have about 4 1/2" or 4 5/8" backspacing because that is what most manufacturers build. In fact, Weld is the only company I've seen which gives you an option. My Eagle's have 4 1/2" backspacing. Look at my pics in my gallary, maybe it will help you make up you mind.
#5
#7