Best power cords in the $250-$400 range?


I am still running stock factory cords and am looking to upgrade.
My system:
Speakers: Proac Studio 200,Proac CC2,Definitive BPZ/A in-walls
Sub: Sunfire Architectural Signature
Front End CD: Denon 2910 Processor: Rotel 1066
Amp: Rotel 1095
Power Center: Monster 3600

What would you recommend for me getting started to hear the biggest positive impact for my DVD and Pre-amp? For my Amp? Should I put more $$ into any one cord? Should I upgrade my CD/DVD and spend less on cords? Hope this will start a good discussion.
sempaul
hi launche:

did your experience with the 3500 with amps include a softening of the highs and a more distant perspective ?

have you ever tried a hydra ?