Depends on how much you ski and how much you're free to travel. If you want to ski 100 days at Vail/Beaver/etc, then the EPIC is your best bet. If you're not going to hit any location more than 5 days, and can move around, MAX is a better option.
We typically stay in Beaver Creek, so EPIC, covering at least Beaver, Vail, Brek, and A-basin, is an easy choice.