i can't go past my ring sling (i have an ellaroo) for the quick trip to the shops...i shove into my handbag and rip it out when i need it. it also doubles as a comforter blankie for DD when she cracks it .

like you, i find the ergo takes a bit more time and i dont have quite as much freedom of movement (also doesnt quite fit nicely into a handbag LOL!)..also in the ring sling they can curl up like little bunny rabbits against your chest as newborns and mwaaahhhhhhhhhh it's just divine! LOL!

as the others have said you can NEVER have too many. seriously.