I've owned a Pentium 4 520J (clocked at 2.8 GHz, HT enabled, 1MB L2 Cache, NX bit), a large number of Pentium 4 520s and a P4 @ 2.66 GHz. The wonderful futuristic startup screen with the brassy logo, the high amount of MHz for the time which'd always seemed futuristic and exhilarating, the fast...