Hot side sleeper: Helix Midnight Lux vs. Brooklyn Bedding Aurora?

165lb, 5'10 guy. My current mattress is a cheap $200 memory foam one and it's brutally hot. Looking for a mattress with the following properties:

  • Sleeps cool
  • Good for a side/back sleeper like me
  • On the firmer end of medium
  • Slight preference for not having a traditional memory foam feel (I think i just have PTSD)

The Helix Midnight Lux and Brooklyn Bedding Aurora seem to be the most recommended. Any strong feelings on either? Budget isn't a consideration. Thanks!