What power cord would you recommend?

I have an Arcam Diva AVR200 and am thinking of upgrading the power cord. First question, is it worth it? Next, what pc would you recommend? I’m willing to spend up to $300 new or used. I’ve read articles on AZ Tsumani II, Van Den Hul Mainstream, Cardas Golden Reference, and Transparent Reference Powerlink etc. etc.
The rest of my setup include:
Totem Model 1 signatures (L, C, R)
Van Den Hul CS-122 Hybrid with jumpers
Totem Mite (Surround L, R)
Van Den Hul Clearwater for a 30' run with jumpers
Totem Thunder Sub
Pioneer Elite DVD Player
MSB Nelson Link III & P1000 Power Base (Cardas Hexlink 5C)
PS Audio high current uo, juice bar, power port, xStream Plus

I mainly listen to Jazz, Opera and Symphony music and watch lots of sci fi movies.

Any other advice on tweaks would be appreciated.

PMP