powercord for a Symphonic Line La Musica

I am looking for a power cable for mijSymphonic Line La Musica integrated amplifier. My CD transport (CEC TL51x) and DAC (wadia 12) both use a NBS dragon fly power cables, I also tried one with the amp but I don't think it is a good combo. Maybe I am expecting to much since the power cables on my DAC and transport gave a real improvement. Should I expect less of an improvement for my amp or should I use an other power cable for my amp. I am looking for something that doesn't break the bank. Brands that I can buy here are NBS, Shunyata, KEMP, Nordost, Cardas and maybe some other brands. Should I move futher up in the NS series? I didn't like the mine/serpent much.

Any advise is welcome.