The best replacement for pentium 4 is pentium d.

The best alternatives to pentium 4 are rated as following:
★★★★★  pentium d
★★★★  celeron
★★★  core 2 duo
★★★  pentium m
★★★  dual core
★★  celeron d
★  i3
★  athlon 64
★  amd
★  xeon
★  centrino
★  atom
★  pentium dual core
★  d
  amd athlon 64
  pentium 4 ht
  core 2
  core duo
  sempron
  athlon
  core i5
  duo core
  amd athlon
  intel core 2 duo
  intel i3
  intel core 2 quad
  m
  amd dual core
  quad core
  dual core 2
  dual core better
  i5 processor
  celeron d which is better
  intel dual core
  intel celeron
  pentium d better
  celeron m
  pentium duo core
  pentium d processor
  amd sempron

Your alternative for pentium 4 is not listed? Suggest!
Speaking about pentium 4, one probably shouldn't forget about pentium m.

Other search terms related to pentium 4 and their ratings are:
★★★★★ pentium m
★★★ centrino
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