The best replacement for he-500 is he-400.

The best alternatives to he-500 are rated as following:
★★★★★  he-400
★★★★★  hd650
★★★★★  hd600
★★★★  he-6
★★★★  lcd-x
★★★  alpha dogs
★★  he-5le
★  beyerdynamic t1
★  lcd-2
  audeze lcd-2

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

Other search terms related to he-500 and their ratings are:
★★★★★ asgard
★★★ lyr
You have in mind a companion for he-500 and it is not yet here? Propose!



Google Trends

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he-500
he-400
hd650