hi all. my DS is 2 weeks old today, and i have a 3.5 year old DD. i had a peanut shell sling with her, but didnt like it very much. now with chasing DD, i think it would be easier to have a carrier for DS at some points during my day. i need recs though! i have looked at/am considering moby wrap, an ergo, baby k'tan, and the classic bjorn. i realize these are all very different, but just looking for advice since these are all a little pricier. thanks so much for any help!