The best replacement for 500r is 650d.

The best alternatives to 500r are rated as following:
★★★★★  650d
★★★★  600t
★★★  r4
★★★  400r
★★★  c70
★★★  phantom 410
★★★  650r
★★  550d
★★  fractal r4
★★  250r
★★  haf xm
★★  arc midi
★★  gs500f
★  suzuki gs500f
★  air 540
★  300r
★  define r4
★  p280
★  gs500
★  750d
★  ninja 250r
  haf 932
  nzxt phantom 410
  suzuki gs500
  cm 690
  nzxt phantom
  haf 922
  ninja 650r

Your alternative for 500r is not listed? Suggest!
Speaking about 500r, one probably shouldn't forget about h100.

Other search terms related to 500r and their ratings are:
★★★★★ h100
★★ h100i
You have in mind a companion for 500r and it is not yet here? Propose!



Google Trends

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500r
650d
600t