XLR-RCA adapters - which to choose?

I need an RCA male to XLR male adapter because my SACD player doesn't have balanced outputs and I don't want to reterminate my (expensive) Nirvana S-X Ltd interconnects! Does anyone have a view on who makes the best and/or best value adapters? I have been considering Purist Audio Design (expensive) and Cardas (less expensive). Is there much differnce between them and are ther others I should look at? Thanks