As bp said, I found the color cams to be a little different to dial in than how I'd typically set up with IR. Try running with a little more vs less 3D noise reduction. Gain had probably the biggest effect for my scene. I run mine at 30. At a more fine level, try turning down the sharpening to help reduce the "sparkle" effect. I use 35. Gamma a little higher too can help filter that.
Generally, the thing helps these cams most is to add more light and just a little more helps a lot. But you look to have quite a bit there already. I found that mine looks MUCH better with the internal illuminators turned off and relying only on external lighting. The cam seems to adjust something internally when you switch those on. I have a very dark scene and expected to use the lights to help some but, even with whatever light they may add, I could never get things to look as good with them on. You already have a relatively lot of light and background light there so you may not see that as much but try toggling them on and off to see how that changes things.
One thing that I found helpful for fine tuning for noise is to digitally zoom in a little and pan to some area where you have "sparkles" or whatever artifacts while making adjustments. It will look crappy as digital zoom always does but you're able to see the effect of small changes better.
