Outlets and Wire Gauge? - Please help!

The install was just completed and I am now afraid to connect my gear. Both my PS Audio PowerPlant 20 and Puritan Labs PM156 both say it is okay to connect to a 20A outlet, but the labels on the back of each read 12A Max and 15A, respectively. I have direct communication with each saying it is okay to do so.

Yes, it is. It's quite common, especially in the kitchen where 20 A circuits are run to multiple 15A outlets.  Of course, requires 12 gauge wire + 20A breaker, but this is absolutely routine.

The use of 20A circuits is recommended for multiple outlets, and sometimes required.  For instance, if your refrigerator is run on a circuit with other outlets that circuit should be 20A.

Does my PC need to rated for 15A? I would think any quality after market would be? 

My PP20 charts draw, which is super cool. I was able to see my 30WPC Accuphase A36 pulling 300W, which became 360W when my friend brought over his Accuphase preamp. The total draw dropped to ~100W when I switched to my 400WPC AGD Gran Vivace. This was a cool lesson what I only guessed that solid state class A amps are power hungry, but this assumption could be wrong and specific to things other than class? I truly don't know.

The sensitivity and impedance of the speaker has a lot to do with power draw from the amp.

@audioguy85 

I also have the AQ Edison nrg outlets but I am running 10/2 to them. Did you back wire your outlets or wrap the wire around the screw? I found it very difficult to wrap the wire so I back wired mine. The screw seems to clamp down fine but I am wondering if I should try to wrap the wire around the screw. Have you tried both ways and could you hear a difference between the two ? Thanks ! 
 

Ron