[H] Need CPU + Motherboard + RAM + ?? What's the BEST?

[KHumrich]

 
 
What is the BEST motherboard that is very stable, and had nice features on
it of course.
 
Must suppose SATA Raid
 
Must be Dual Core CPU and use DDR2 memory.
 
PCI-Express Graphics Cards, and SLI
 
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What and under $500, what's the best CPU?  OR if the 2gigs or so memory, and
motherboard are cheap enough I suppose  a bit more.
 
 
 
I need some idea guys, please, I have been out the upgrade/hardware loop for
too long, and need advice and opinions from all of you!
 
 
 
Ken