DCCA or Shunyata help?

I've realized quite a nice increase in detail after installing some NOS tubes in my 300b integrated amp. Now, I've kind of got it in my head that this improvement has revealed a need to upgrade power cords. I'm currently using an older Shunyata Taipan and am looking hard at a DCCA Eminence PC. Any shared experiences and thoughts on these products will be appreciated. Also, I'm more than willing to hear that I should stay put.