I think Coloccini, Taylor, Williamson and Williams is a good quartet of centre-backs to go into the season with, particularly if our cover options are Perch, Tavernier, Good and Streete.
Williams is a good footballer as well as a defender; I know the Swansea style gets a bit of a panning but it's great if we sign him and he's already really comfortable with using the ball well and keeping possession.