I'm about to order a new heatsink for my AMD 2500+, but I can't decide on which one to get. I trying to decide between the SLK-947U and the MCX-462V. The Swiftech aparently works well with low airflow fans, which is what I'll be using (Panaflo L1A), but the Thermalright is ranked higher in the heatsink round-up on overclockers.com. Which one will work beter for me with the fan I am using? Thanks.