best power cord for Jadis Orchestra Reference

I would recommend Purist warmer or Stealth more dynamic.

Since I have the same amp I suggest a Synergistic Research power cable. If you have not upgraded the A/C outlet I would do that first and also the fuse to your amp. With Synergistic Research you can audition the fuse and A/c outlet and if not happy send them back.

Either The Cable Company or High End Electronics can ship to you and both are good about Synergistic Research product returns.

Buy a MAGIC power cord from Signalcable.com for around $80, you'll quit spending a lot on power cords :-) Dave is an awesome guy to deal with there.

If you are in the US, you can use The Cable Company. They'll send you whatever you want to demo first. One the Jadis, I've heard the ESP Essence. They work well on just about any amp. I use them myself. Richard Grey PC is another very good choice. If you can't demo first, the ESP and RGPC are pretty safe picks as far as PC's go. But always demo first if you can.