I've had this Blackstar 240 model long enough... time to void the warranty!
Power draw: 133W
Cooling fans: 3X 80mm 3-watt cheap, loud, decent airflow
Heatsink: 1/8 inch thick, flat aluminum plate
Drivers: 2X each putting out 96V@630mA (total ~120W going through LED array, 1.5W per LED @2.4V forward voltage average)

Upgrades:
1. Much quieter fans, each pushing ~36 CFM (should be more than current airflow)
2. High quality thermal paste (current is cheap white stuff)
3. Finned aluminum heat sinks attached to existing plate (free from old projection TV)

For heat sinks surface area is key. The difference in surface area of the new vs. old setup (only using the footprint of the heat sinks) amounts to a 560% increase.(~32 CI to ~182 CI).

At stock, the back of the heat sink measured ~20 degrees F above ambient. I hope to lower this number, which in my experience would be noticeable with just the thermal paste. The additional surface area should make a great difference, and the fans should push more air and will definitely be quieter.

Buying fans and paste new, total cost ~$25-30. Destroying warranties... priceless.