The best replacement for mx518 is g5.

The best alternatives to mx518 are rated as following:
★★★★★  g5
★★★★  deathadder
★★★  g400
★★  g9x
★★  mx510
★★  g500
★★  g9
★★  razer diamondback
★  diamondback
★  abyssus
★  g300
★  xai
★  mx1000
★  intelli 3.0
★  razer deathadder
★  razer
★  mx500
  ms 3.0
  kinzu
  copperhead
  logitech g5
  death adder
  ikari optical
  intellimouse 3.0
  intelli
  m510
  g5 mouse
  ikari
  razor diamondback

Your alternative for mx518 is not listed? Suggest!
Speaking about mx518, one probably shouldn't forget about setpoint.

Other search terms related to mx518 and their ratings are:
★★★★★ setpoint
You have in mind a companion for mx518 and it is not yet here? Propose!



Google Trends

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mx518
g5
deathadder