Power amps into surge protector/Conditioner or DIRECT to wall? Final verdict?

I live in a loft that has 100 other tenants the power is dirty from a lot of appliances. Tried a Niagara 5000 not that much of a difference in the noise floor for the money.

Traded it in for a New PS Audio 15 Power Generator Huge Difference. Also you can call them with any questions and in most cases get an immediate response. 

My Marantz AV newest model 8805  went dead on one side had the dealer contact the company for service  14 days later still no response. ( this is off the topic put has anyone else had these issue with Marantz CS?)

Surge protectors are better than nothing.  They protect mostly against high freqency spikes and line frequencies in the khz range.  They kick in about 200v so your class D powet suppy is very susceptible just like a computer. It is essentially a music computer.  Isolation transformers with HF filters are very good cleaning up the line
UPS units can be good but need to be continuous sign wave type.  Much of the big amps will far exceed a UPS ability unless tou shell out big bucks.

I have a Furman IT Ref 15i and all equipment is plugged into it. This includes my Primaluna Dialogue Prem HP Integrated amp. Sounds beautiful!

Have all my kit plugged into a Niagara 7000 with a Hurricane 20 amp pc to the wall. It has given me peace of mind from power surges - lost a alovely pre amp in the past. The real bonus is the way it has transformed the performance of my Devialet amps. Massively improved detail, bass, faster transients and blacker background. Quite expensive but worth it IMO.

@aberyclark  how did you make the decision to go for the Torus TOT MAX? I'm curious, it looks good.