Matching Cable for Pass Labs Amp & AR preamp

I am trying to find a suitable XLR cable that works well between my Pass Labs Aleph 0 (power amp) and Audio Research LS5 MKII (preamp). Can someone advise?
We have used Pass gear at many CES shows and the combo with Discovery Cables has worked quite well. You might want to check with Peter Perkins of Pass for his reccomendation.
I used Harmonic Technolgy Pro-Silway MKII's with excellent results between my Aleph-3 and Rogue 99 tube preamp.
The used prices are dropping for the MKII's as they now have a MKIII out.