Are you going to go back to the TicTac Mantarays XT Bios then?
You must be pretty dissapointed at the temps you got from the bigwater kit... I know I would be. Hopefully everything is resolved with your issue, I know how it is to be so frustrated because you have no clue what is wrong with your comp.
I am also experiencing troubles, I about cried trying to get my comp working again after installing that nb cooler. My idle temps are up 5 degrees celsius at only 220x10. I am at a much lower vcore though. I am at 1.8 vcore and my temps are the same as they were when my vcore was 1.9. Maybe the cooler disrupted airflow or something... I'm getting some as5 and im gonna reinstall my heatsink, maybe that will help. I am also getting that adapter so I can put in my duct mod.