This is Erin's review of the 31 series, video review is included in the link. Measurements are close to KEFs and other then the mid bass bump, it looks good and you can compare to the other models. Just remember inwall measurements are more difficult then "box speakers" as the baffle isn't infinite but as close as it can be for the measurement gear.
Kef Ci3160RL-THX Review
www.erinsaudiocorner.com