Power Cords for VAC 140/140 or 70/70 tube amps


I am looking to upgrade power cords on my VAC Renaissance 140/140 monoblocks.

Does anyone owning or using VAC's 300-B tube-based amps (the 140/140, the 70/70, the 30/30 or the 30/70) have any tips? I want something with excellent current delivery and that will not throw off the basic voicing of the amps.

Thank you in advance.
raquel
I use the Virtual dynamics power 3. It a cheap power cord ($65) but it's much better than the stock cord that comes with it.
I also tried the Power 3 mentioned above on my 30/30 Signature... It gave me a stronger bass and fuller lower midrange, but rolled off the extension on the highs considerably in my system. If you are looking for a cord that does not change the tonal "balance" much, but gives you a dramatic improvement, try the Elrod EPS3. It gave me a LOT more transient speed and overall clarity/detail, without any "heavyness", colorations, or roll-off. I tried all of the V.D. cables except for the Nite, and they all gave me a stronger bass, and as I upgraded to the top of the line they sounded a bit better, but each did something to the upper mids or highs that annoyed me with this amp. Hope this helps...
I have great results using Cardas big power cords for the 140 mono blocs. Khai Do