The best replacement for athlon is turion.

The best alternatives to athlon are rated as following:
★★★★★  turion
★★★★  phenom
★★★★  intel
★★★★  pentium
★★★★  sempron
★★  fx
★★  duron
★★  opteron
★  pentium 4
★  phenom ii
★  celeron
★  intel processor
★  amd turion
  sempron which is better
  turion which is better
  intel processors
  p4
  intel pentium
  pentium 3
  celeron processor
  phenom faster
  turion processor
  intel celeron
  intel core 2 duo
  amd sempron
  centrino
  amd phenom
  intel pentium 4

Your alternative for athlon is not listed? Suggest!
Speaking about athlon, one probably shouldn't forget about sempron.

Other search terms related to athlon and their ratings are:
★★★★★ sempron
★ intel celeron
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Google Trends

Scale is based on the average worldwide traffic of athlon in all years. Click on graph for more.
athlon
turion
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