Using XLR to RCA adapters on High Quality Cables?

I have some Cardas Golden Reference XLR cables I am not using due to changing out my preamp to an RCA only connection. I am currently using "mid-level" Transparent RCA cables for my monos, blu-ray, etc. Will getting some Cardas XLR to RCA adapters improve my system performance? I preferred the onkyo 905 to my past Halcro SSP-200 & Lexicon MC12B which caused the cable switch.

Onkyo 905 receiver / B&W 800n fronts / B&W 802 Sides / Sony BDV5000 Blu Ray / Lexicon 501 Monos / Sunfire 5 channel