Dedicated lines will make bigger difference than any power cord upgrade. Improper power cord can damage your amp, this is why you will always get a cord that can pass enough current for your amp to last. Don't use cheap power strip, this could damage, or at least degrade your amp. If you can hear any difference a power cord change might make then go for it, It would be last on my list of upgrades but as always in audio, keep an open wallet. (I mean mind).
How important is powercord synergy?
I understand the importance of system synergy as it relates to interconnects and speaker cable. Is matching the PC to the system as important or is just "clean" power all we're trying to achieve. I'm in the process of slowly upgrading my system and have been holding off with buying new cables until I have all the new components. My PC is Monster Cable which runs through a cheap power strip / surge protector. I'd like to upgrade sooner rather than later. Any opinions?