Re: If you had to pick just one kind of wool...
Well, I'm biased because I am a WAHM hand knitter (and dyer), but you can get handknits in ANY color you want. They can also be super customized for great fit.
I have seen recently babies having reactions to the elastic/rubber content that is in some interlock, so if you are moving to wool for sensitivity reasons, do be aware of that.
Also, I'm a big fan of polar fleece. Also, you can get it custom any way you want, and they are the easiest care thing on the market. And CHEAP.
Wife to Chuck since 2000, PROUD mom through domestic adoption to my sweet baby boys, CJ born 1.20.2011 and Carson, born 2.27.2013!