To power condition or not to power condition AVR

@akg_ca thanks for your reply.  Seems like poor power supply would benefit from power conditioning more than a high quality supply? But, according to the manufacturer "Unlike most AV amps the AVR400 has a huge toroidal transformer that gives it enough current to tame even the most difficult of speaker loads." While there is undoubtedly hype here, the amp measured well in a review test bench, and sounds more accurate to me compared with Onkyo, Denon, Pioneer, etc.

Already using an after market cable directly to hospital grade outlet fed by dedicated 10 AWG, 20 amp line.

I should have read your response to my thread about power cords first, I see where you are coming from.

I've heard the PS AUDIO Dectet Power Center is a great bang for the buck but every conditioner I've tried killed the dynamics.

The Arcam looks like a decent unit.
http://www.soundandvision.com/content/arcam-avr400-av-receiver#oT8I4Md9o6eCKlAx.97
 
Every power conditioner that I've tried restricted the dynamics or soundstage of an amp, (But I have never tried a high-end, high-priced regenerator).

Arcam does not list the specs for current, only nominal power (presumably into 8 ohms)...

Output power 130W p/c (2 channels driven)

Output power 90W p/c (7 channels driven)

I would think that you would want unrestricted power on demand, and that would come from your 20A dedicated line. If you have steady line voltage into your house with no "brown outs" in your area, plugging into the wall receptacle may provide the best performance.
I would be more concerned with good surge protection from a non-current limiting power strip, i.e., Furman offers a power strip with EMI/RFI noise filtering.

Unless you have wild power swings because you live in an old apartment or the like, where a power conditioner assists in flattening out the swings with an element of surge protection, there is no reason to introduce a power conditioner.

as properly highlighted in the prior posts, they are just detracting and limiting filters that detract from audio performance. 

As AVRs already suffer from lousy cheap power supplies, the filtering effects are magnified to the negative, not the positive.