I just got the sythe s-flex fans, they are great and easy to install. BFG is good, EVGA is good. Can't go wrong with either. BFG has lifetime warranty I think. But I have always bought EVGA and they hold value well when I go to resell them. As for mobo manufacterers, I have Asus, and I have EVGA. Both are good. Asus you pay a premium for but they are solid boards. I went with the EVGA because of overclocking options, and the price was better. My last Asus A8N-SLI deluxe did not overclock well so I thought I would try this board. And I am not dissapointed. I hit 3.6GHZ!! I was stable for 8 hours using super pi and prime 95, BUT, my temps were way too high. I just ordered water cooling euipment today so I am excited to get that in and try and push this thing to the max. E6600+water cooling equipment, including blocks for GPU, was less than top of the line Quad Core, BUT, I will see if I can clock as high as those guys are.
C2 Q6600 @3.6
2- 1GB Crucial Ballistix DDR2 1000(1100 @5-5-5-12 2.2v)
2 EVGA 280GTX in sli
2 WD Raptor 74GB(RAID0)
1 WD Raptor 150GB
X-FI Fatal1ty Edition (Beyerdynamic DT770/80 with PA2v2 amp)
PC P&C 1 Kilowatt PSU
Dell 3007 WFP 30" LCD
LG 18x DVD/CD RW
Silverstone TJ09 (5-120mm Sythe S-Flex fans)-Best case on the planet...
Watercooled. Iwaki MD20RLT>PA120.3(6 fan push/pull)>Apogee GT>2 MCW60's>T-line