Replacing generic RECEPTACLES

@jhills........... Thank you for your post.... I just want to tell you that i know that the 20A is not necessary for a CDP, but since it is on a non dedicated circuit (15A} I thought it would be better to put in on a dedicated circuit, and since i do have to run a dedicated circuit i thought it might be better to run a 20A dedicated line on my other wall by my CDP just in case of adding something else..Just in case....... Now let me ask you a question please, Do u think a CDP should be on a dedicated line? 

I wasn’t referring to the 20A dedicated circuit argument. Wasn’t that obvious?

@tattooedtrackman  I don't believe that a CDP necessarily needs to be on a completely dedicated circuit, but would avoid sharing a circuit with appliances or even a high currant power amp.
Because good conductivity and tight connections is important - I do believe in the use of quality receptacles and because there is a bit of noise and grunge introduced from appliances and even down line transformers, and minor voltage dips and spikes in nearly all residential electrical circuits - I do believe in the use of good power conditioners for both video and audio gear...Jim

Yes you can put a 15 amp plug on a 20 amp circuit, but why would you want to?  
You can also put a 20 amp plug on a 15 amp circuit,  but you run the risk of burning down the house and everything in it. Oh yeah, and it's against pretty much every code for that reason!

Some people use 10 guage, but 12 Guage wire will handle both in a home setting, but the breaker might have to be changed to match the plug. 

Hope this helps.

JD