Thanks for the feedback. Basically just reaffirmed what I thought. Given that this processor is CHEAPER for me than an E6850 and it is likely a higher binned version (server chips tend to be chosen a bit more carefully), it seems like a no brainer.

I have had reasonable success with my Q6600 B3 quads core chip (an 800 MHz overclock is nothing to complain about), as it is stable 24 hr Prime 95 on all 4 cores.

Unfortunately, my Q6600 is running pretty hot (63-65C under load in Core Temp), even though I added the Transpiper module to the PWM and upgraded from the Tuniq Tower 120 HSF to the Thermalright Ultra 120 Extreme HS and Scythe SFF-21F fan. I tried lapping the heatsink and CPU heat shield, and although this made my temperatures more uniform, they did little to reduce overall temperature levels.

My plan now is to max out the performance of the X6085 processor on air, and then buy parts to push it a bit via liquid cool for Christmas.