The best replacement for m500 is 840 evo.

The best alternatives to m500 are rated as following:
★★★★★  840 evo
★★★★★  m4
★★★★  m550
★★★★  840 pro
★★★  v300
★★★  intel 530
★★★  seagate 600
★★★  830
★★★  xlr8
★★  bp4
★★  panasonic v700
★★  hyperx 3k
★★  t6600
★  ultra plus
★  m510
★  hyperx
★  ssdnow
★  samsung 840 evo
★  samsung evo
★  sx900
★  o2 mini
★  intel 520
★  samsung 840 pro
★  samsung 840
  g400
  vx
  l hawk

Your alternative for m500 is not listed? Suggest!
Speaking about m500, one probably shouldn't forget about alpine type r.

Other search terms related to m500 and their ratings are:
★★★★★ alpine type r
You have in mind a companion for m500 and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of m500 in all years. Click on graph for more.
m500
840 evo
m4