What Are your impressions?

I have been researching different recepticles to up-grade to, up-on the research, I have found that Beryllium copper to be the best available, Now to the question, The Beryllium copper is still plated with either Rhodium or your choice of gold plated, If any, what Is your impressions of the sound between these different platings?, Thankyou community, I look forward to everyone's reply.