Monopod is no substitute for tripod for even with the add-on legs, so if you didn't have a tripod at the first place, getting a tripod first is anytime a better choice than getting a monopod.  My 680 + 322rc2 already cost 550RM and btw, you don't need quick release if you plan to use a head with the monopod unless the head you are getting doesnt come with a quick release....