Jodi - I have to be honest, I used size 8 & 9. I needed size 9 for the gauge, and I don't like my ribbing to be too tight, so I used size 8 for that. I especially didn't want it to pull when I did the edging around the button area. In my opinion, if you are using size 10, I'd use nothing smaller than 8's for the ribbing.
ArtLady? Waddaya think?
Addicted to knitting...