I'd just love to have a dual Thunderbird rig @2000mhz per/chip (and dreaming would be 4mb of on die l1 full speed cache), @10k HD, 1024mb RAM, and a 128bit, 800mhz, 256mb Radeon IV with a 70" plasma screen and a 50x30x50 CD burner.
Now that would be sick...
I'll be dead before then, but my children will enjoy it.