Using 15 amp power conditioner and power cords with 20 amp wired outlet.

I’m thinking of having my electrician run a 20 amp dedicated line in place of the existing household line that is in the living room of my 1959 built house and most likely is ungrounded and part of a string of multiple outlets on the same circuit. 

I know this has probably been covered many times before and, yes I may check the archives for solutions but thought I would inquire here anyway. 

Since I’m going to he trouble of running a dedicated line, I figure I might as well get it to 20 amp specs. In the future I may order a new solid state amp in the 20 amp version for better bass and dynamics. 

For now though, I would continue to use my existing 15 amp power conditioner (Bryston BIT-15) and power cords. As far as I know the power conditioner would protect my components and nothing would malfunction as far as I can tell. Please feel free to educate me here. 

My future 20 amp upgrades would be a new Bryston cubed series amp with a 20 amp option and possibly moving up to the Bryston BIT-20 power conditioner for better bass, quietness and dynamics potentially with my low impedence Thiel CS-3.6 speakers. 

Thanks for any help.