hello, due dc2 in April and am looking for a good baby carrier. I had a sling with dc1, (baby bjorn I think) but as he was so big, it always felt as though he was falling out, and it also killed my back! I have quite bad sciatica at the moment, that comes and goes, so am looking for something that would spread the weight so as to not target one area of my back. Also, with a very hyperactive 29mo, I need something that can literally be on and off in seconds (the baby bjorn sling was brill for this...) I think I want a more upright carrier, as opposed to a lay down sling type, that can be changed from back facing to front. And also something that doesn't break the bank would be preferable :) (and something dp would wear!!) TIA :)