I think you should see this site:
http://www.hexus.net/content/reviews...lld19JRD0xMjU1
It shows a Venice 3000+ overclocked up to 2.8ghz with the stock heatsink. The processor is 300€ less than the San Diego, and have SSE3 instructions as well as better memory controller and better heat dissipation. Has half the L2 cache but if you get that overclock with no heat problems sure you will have better perf than with the Clawhammer/SanDiego4000. Sure, the San Diego can do probably more than 2.8ghz, but don't expect to get to 3ghz without watercooling. So, looking at price/ghz the Venice3000+ is the better (by a great margin) option.
Also, if you can afford a Clawhammer4000, get for a Venice3000 and spend those 300€ in a better VGA, or whatever you want.
Also, for the memory: get a pack of GeiL Ultra-X 2x512Mb ~200€. It can get 260mhz with good timings (2-2-2-5) with few or no voltage tweak.
For the HD, Western Digital no doubt.
And the MoBo, think about a DFI LanParty UT-D. Some 10-15€ more and you have the better SLI MoBo available at the moment, and with exactly the same additives than the ASUS.
Hope it helps
