I never got the "quick change" thing. In fact I think it's faster doing a regular sprocket as you only have one big nut to undo and torque back versus 6? smaller nuts.... quick change sprocket setup. Costwise, it's a wash, assuming you will replace your sprocket at least one more time, and... of course... it makes it much easier.
Supersprox are top quality and last longer than oem in my experience.If you decide Not to go the quick change route look at supersprox for a oem type replacement. Oem may be the longest lasting but at the highest cost.