Loc what you're doing is fine; you can use both outlets with no problem.
I suggest (if you're not going to install a dedicated circuit, and BTW you only need one, not multiples) then you might try upgrading just the outlet itself. Many options available in that regard.
I have the Wattgate 381. Expensive but worth it, at least it was for me ... Great results, even over the Hubbles or Levitons industrial grades. YMMV depending of course on the level of your rig.
I suggest (if you're not going to install a dedicated circuit, and BTW you only need one, not multiples) then you might try upgrading just the outlet itself. Many options available in that regard.
I have the Wattgate 381. Expensive but worth it, at least it was for me ... Great results, even over the Hubbles or Levitons industrial grades. YMMV depending of course on the level of your rig.