The best replacement for 305 is 350.

The best alternatives to 305 are rated as following:
★★★★★  350
★★★★  307
★★★  302
★★  327
★★  350 how to tell
★★  285
★★  350 engine
★  405
★  315
★  33 tire
★  310
★  310xt
★  205
  33
  ford 302
  4.3
  adreno 225
  fr60
  chevy 350
  350 better
  318
  mali 400
  olds 307
  307 chevy
  285 tires
  garmin 405
  350 motor
  110
  350 chevy
  304
  35 tires
  forerunner 405
  edge 305
  lg 405

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Speaking about 305, one probably shouldn't forget about heart rate monitor.

Other search terms related to 305 and their ratings are:
★★★★★ heart rate monitor
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Google Trends

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