Lost in the Powercord Jungle

I am interested in upgrading my stock powercords and am totally confused by all the ads, claims and choices available. All the sales hype makes me sketical. I would like to ask my fellow Audiogner's what they might suggest for my system and any experiences they have had with thier powercords. I am searching for a more open sound with more dynamics and greater detal. My budget would need to be around $1.5k max per cord. I have the Mark Levinson Model 32 Reference preamp, Model 30.6 DAC, Model 31.5 Transport. My power amps are Krell FPB 350 MC monoblocks with hard wired cords. (should I change these out and have a 20amp EIC male socket installed to allow the use of an upgraded powercord?) Finally, all my speaker and I/C's are Transparent Reference XL and speakers are Dynaudio Temptations.

Thank you in advance for your input!

Dan