I ordered the Athlon 950 motherboard combo from Tiger direct. Just starting to put my system together I was wondering if the dual fan heat sink that attaches to the Athlon is sufficient enough? Should I get something better? There are so many Orb's, Golden Orb, Blue Orb, Chrome Orb, etc. What is the difference and which is best? How do they compare between a standard $8.50 dual heatsink fan? What are the pros and cons?