but my qns to myself would be: i will be more outdoor or indoor? and if indoor there will be flash involved etc...
imo 11-16 is really wide and sometime to take indoor and the limited zoom, u need to change lens or go real close. otherwise the pic look "funny"
yet to try both lens thus cant really say much. but seeing alot of review, more are keen on 11-16. then it will be a pure UWA.
but a 12-24 will give u a bit of balance.