I think it was last March that Mark Von Lanken did a real nice comparo between the HMC150 and Sony Z5U. Covered low light and rolling shutter effects. In that comparison, the HMC150 came out looking quite good. Cannot find a link for it here, but it is easly found on Marks web site. That review suggests that if the NX5U has the same chips as the Z5U, you may want to stick with your HMC150. Sorry I cannot find the link now.