Time for an Upgrade?

Hi guys!

I'm currently using Hikvision 6 x DS-2CD2142FWD-i 2.8mm cameras through the DS-7608NI-E2/8P/A.

I have to say the daytime pictures from these cameras is superb but I'm a bit disappointed with the night results.

I've been reading your reviews of the DS-2CD2385FWD-i turret camera and wondered if its worth replacing one of my existing cameras to test performance?

Or could you recommend a better upgrade for increased night performance?

Regards & thanks