That is a nice rig. But take it from me, PCMark04 is a waste of a benchmark.
My P4 2.6@3.2 gets 4600 points and 5500 when I disable HT and set High Priority status. So according to this benchmark, the computer is actually faster without HT (BS!!!) and it's about 43% faster than yours (taking my highest score), which is COMPLETELY false.
You should try to benchmark games, SuperPi (1million decimals), SETI@Home, 3dmark01 (should get around 23000-24000 points)
But to tell you the truth, I don't really think you need to benchmark your PC because anyone knows that you have outstanding components across the line. Now overclock your processor ... you know you want to.