At the moment I'm in two minds whether to get the Gigabyte DS3 or DS4 for my E6400. The DS3 looks simple enough to watercool by just switching the cpu and chipset blocks from my A8N-SLi Deluxe to it. But the DS4 looks like it's going to be a pain in the arse with its all-in-one passive system. Am I going to need to get a mosfet waterblock if I choose the DS4? Or is anyone able to recommend an alternative passive mosfet cooler, bearing in mind that there's going to be very little airflow over it (I've only got one 120mm fan on the side of my case and it's no-where near the mosfets. It's pretty much blowing straight onto the RAM on my A8N-Sli deluxe).