If you plan on printing images with black or very dark areas on clear film or gloss photo stock, from what I've seen, the Z3200 eliminates most of the star wheel tracking problem. If you don't need super-saturated/brilliant reds and will mainly print on satin photo or matte, or canvas...then the Z3100 will do a fantastic job on those media...and it's a tremendous bargain at the discount prices I've seen.