I doubt there is a best one. Lamm aren't very sensitive to PC's. I use Oyaide Tunami for my ML2.1, M1.2R, LL2.1, Signalcable offers some very interesting PC's, silver with Furutech, one of my audiophile friends used Nordost Odin with his ML3's and when he sold the Odins, it was also ok :-)
