I recently just did a build and I am about to do another
With my reads here, I have consistently heard bad majo about NVidia chipset MOBO's
Intel X48 or X38 MOBO chipset (Asus or Gigabyte seem to be the popular ones here)
I did a Asus P5E Deluxe with my build and love it.
GPU......ATI 4870 or (2) 4870 Crossfired or 4870x2 (order less $ to higher $)
Memory.......OCZ popular choice here, I like Corsair.
PSU....seems good. I did an Antec 850W modular on my build and very happy. newegg still has a great deal on it.http://www.newegg.com/Product/Product.aspx?Item=N82E16817371009
CPU cooler.....+1 on Xigamatek S1283 (get the accessory retention bracket with it ACK -I7551 )
Western Digital Caviar SE16 WD6400AAKS 640GB 7200 RPM 16MB Cache SATA 3.0Gb/s Hard Drive
Seagate Barracuda 7200.11 ST3500320AS 500GB 7200 RPM 32MB Cache SATA 3.0Gb/s Hard Drive