Definately. I also have the Continuum 500 and you will benefit from using the XLR. Jeffs products are truely balanced and you will get lower noise floor and more resolution.
Rowland Continuum 500, RCA vs. XLR
I recently got a Continuum 500 and using it with an RCA I/C to my Accuphase DP500 CDP. I understand this CDP is a fully balanced design, as well as the C500. I am trying to decide whether it is worth changing my I/C to XLR, or just leave it. I use a 1.0M RSA Poiema for my I/C and changing this to XLR is not cheap, so would appreciate thoughts from C500 owners who have compared it on RCA and XLR mode.