Asus P5AD2 motherboard and associated parts like Intel 560 CPU

The reviews I find on the newer Intel CPUs always talk about heat problems.  Also the fragility of the 775 socket design, in the event you later want to disassemble it.  On the positive, the faster memory, faster PCI-Express replacing AGP, the 3.6 processor, sound exciting for the performance-hungry enthusiast.  The impression I'm left with is that the new technology has some problems that need to be solved.  So should a person hold off before going this route?  What do you think?  It is to the point that you have to use pretty exotic aftermarket cooling just to turn the Prescott-based 3.6GHz on, let alone to overclock it, it seems.  No wonder Intel stock is down.

I'm confused by the Asus DDR2 600MHz motherboard but I read the Intel 925x chipset supports PC5300 533MHz and a review used PC2-4200 DDR2 533  CL=3-3-3-10.  So many different numbers!

Main point of question: If you were recommending a high-end system platform, would you go 775 socket or 478 socket or what, and why.

When the 2nd generation of SATA interface becomes widely available, what order of speed increase over SATA-150 do most experts expect?  If this is coming soon this might be another reason to wait, but it may take a long time I suppose.