Blastermann, I think you've met your match for your lamps. The LR6/CR6 lighting modules are pretty darn cheap (they have to be- the entire lamp is 50$ at HD) and they give excellent color.
The DR-1000 units I have (and I believe all units) have a feedback sensor in them to monitor both color and luminance. The former is a supposition, but given conversations I've had I'm pretty certain it's true.
Now the question is: Can you override the sensor to achieve higher performance?
The sloppy (dare I say that) production of the heat sinks leaves ALOT to be desired. If I had the capability and time I'd take it in and get the face on both units milled flat... and still use the thermal gasket. The outside of the unit is neutral aluminum- I'd have it painted flat flat black.
And after that, looking through the face of the unit you can see what appears to be XPG LEDs. There are about 8 traces going in and out, so if there are rows... that might explain it.
When I get some time (hah!) I'll do a tear down of the units I have for photos.
I'm tempted to remove the optical diffuser and replace it with some optical glass I've got. More transmittance, less diffusing. I'd even go with modifying it so it wasn't so much a 'deep recess' fixture- I didn't want Deep recess, I wanted 1000 lumens. No product offering.
Just some ideas as I wait for the next 400$ of lighting to arrive...