My experience mirrors yours pretty much.
2 conditioners best except i have no LP so i separate digi w/ pre + power. depending on my cables, i find i prefer one combination to another. also, i've used active conditioners (Hydra 2/8, Audience adeptResponse etc), w/ Passive (Audiomagic/Velocitor etc)as well as power strips (BPT PPC or QRT Q-Bar or Oyaide MTB-6 etc). All 3 types provide different sounds/benefits. My preference is a passive or active for digital (reduces noise floor but slows down timing a bit) w/ power strip on amps - no dynamic limitations. I'm still searching for a one box solution which is cheaper/tidier but i'm not sure it exists.
Finally, a trick to try is to run your two conditioners in series..ie. one running off another. the results are even quieter backgrounds but too much for my taste. Best running the power strip to wall and active/passive off the strip. And of course, isolating your power conditioner will further improve again.
2 conditioners best except i have no LP so i separate digi w/ pre + power. depending on my cables, i find i prefer one combination to another. also, i've used active conditioners (Hydra 2/8, Audience adeptResponse etc), w/ Passive (Audiomagic/Velocitor etc)as well as power strips (BPT PPC or QRT Q-Bar or Oyaide MTB-6 etc). All 3 types provide different sounds/benefits. My preference is a passive or active for digital (reduces noise floor but slows down timing a bit) w/ power strip on amps - no dynamic limitations. I'm still searching for a one box solution which is cheaper/tidier but i'm not sure it exists.
Finally, a trick to try is to run your two conditioners in series..ie. one running off another. the results are even quieter backgrounds but too much for my taste. Best running the power strip to wall and active/passive off the strip. And of course, isolating your power conditioner will further improve again.