If you are looking at Intel I can’t really help you much. I have an AMD processor and motherboard that I have been very happy with. I bought everything from newegg.
The mother board is an Abit AN8-SLI motherboard which is a socket 939 board that will support most of the Athlon 64 series parts including the dual core. The board has four SATA2 interfaces, standard dual IDE ATA133 controllers, Gigabit ethernet, 2 firewire 800Mbps ports and 7 USB 2.0 ports. The sound card is built onto the board. The motherboard also came with a SATA RAID driver that supports the four SATA ports onboard. This board is using the single chip Nvidia4-SLI chipset. There are two X16 PCI Express slots that support SLI type video cards.
So far I am pretty happy with the setup (see my signature).
What is the primary use? Are you looking for a game machine? Others here could give you more advice regarding games and if the AMD or Intel parts are better.
I setup my machine primarly as a general home PC and burning DVD’s. I would highly recomend dumping the IDE interface for your hard drives and use only SATA type drives. I am getting about 100MB/Second transfer from my SATA drives.