Re: If you had to pick just one kind of wool...
I could have been happy with a whole stash of Disanas if I didn't need clothes to fit over them or if ds had a wardrobe of stretchy pants. I liked the chocolate brown ones best; they matched just about everything and didn't show lint/stains as much as other colors.
Natural wool is lovely, though. Just know you will be fighting against nature to keep them looking nice, lol. I have a pair of newborn Ruskovilla's that were used so little that they're still nice, and a pair of natural Disanas that have enough wear that I usually choose the brown ones.
We only use Disanas at night now but I loved them for daytime last summer.