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

Low wattage gear should be plugged into one surge protector (common ground) Big amps (over 100 watts/ch) should have their own dedicated 15-20 amp circuit. No surge protector or power conditioner particularly if the amp has a regulated power supply and is run in balanced mode. If a big amp's power supply is not capable of cleaning things up on its own and handling the occasional surge don't buy it. Line level and phono gear is obviously more sensitive and should be on a surge protector. I lost a preamp to a lightening strike along with all my computers, the garage door ops, the telephones and the burglar alarm. The amps just blew it off.
Frankly, I have never had a power conditioner in my system that improved my sound. I am a bit lucky in that I have my very own lawn wart (transformer.) So, this may not be saying much.

The wheels of progress

Pretty expensive solution cleeds. I'm not sure why everyone thinks separate lines will reduce noise. The are all connected to the same main.
Any power supply worth is salt filters noise. It should be particularly good at filtering 60 Hz noise. You would get much more bang for the buck buying a more powerful amp than buying a line conditioner.  Put shorting plugs on the inputs of your amps and put your ear right up to the speaker. You hear any noise? I don't even with my preamp hooked up on a shorted input with the volume all the way up. No noise, none. Yes the phono preamp has some tube rush. Preamp on my usb input to which my computer is connected with the volume all the way up, no noise. All my front end goes to one surge protecting power strip. The amps have 20 amp dedicated lines but no power conditioner. No noise. People will say that I am just lucky and have clean power. Every modern system I have set up is powered the same way, no noise ( excluding phono amps). I also do not use analog preamps which is part of it for sure. Analog preamps will have at least a little noise. Does a little noise affect the sound quality. If it does us vinyl people are in for it. Is it all just a marketing scam aimed at gullible audiophiles?