Replacing generic RECEPTACLES

@ Cleeds-Just quoting NEMA. I admit I haven't disassembled a receptacle. Never saw the need. 

I have. And can say there are major differences in the quality of plain old cheap ($3 to $5) receptacles. Some have internal metal parts which are thin and have little strength. (Particularly bottom feed cheap as can get ones And those cheap multi-outlet sorts) Other have four times thicker metal blades! (yeah even low cost ones) and really great ability to hold the inserted blades over years and years of abuse.
MY praise goes to Pass & Seymour heavy duty outlets for being really well built. One other major difference between 15 amp and 20 amp is the fact the 20 have that ’extra’ strength due to the way the clamping is done on the one odd horizontal blade of the 20 amp plug.The design really is stronger than a 15 amp innards.      
Some high end actually use springs inside, like Furutech. Other are basically like the Pass & Seymour in design inside.

Scratching my head, Why does anyone think that they need a 20A dedicated circuit for a CDP? I see the purpose for using a better outlet receptacle, as a better tighter connection and grip, is always a plus, but I see no purpose in having a dedicated 20A circuit for a CD player and no players that I know of that comes with, or requires a 20A cord. It would surprise me if any CDP or combination DAC and transport pulled more than 5 amps and there are very few power amps that actually require a 20A circuit and have or require a 20A cord. In fact lower amp equipment should not be used in high amp circuits. If something fails, something might burn before the breaker trips.
I have built and wired a number of houses and garages all to UBC and NEC code and can tell you - both 15A and 20A residential circuits are commonly wired with the same 12/2 w/ground Romex wire.....just sayn...Jim

@dill  I couldnt have said that better myself... Well done.. 

Why does anyone think that they need a 20A dedicated circuit for a CDP?

How bout planning for the future? Adding more components, a server, subwoofer, whatever.