120V or 240V

Hi everyone! I am ordering Symphonic Line monoblocs from Germany and am debating whether to have them run on 120 or 240V. I have a dedicated 240V line already installed in my listening room that I use with an Equi=Tech power conditioner that converts 240 into 120 (I used this when I lived in Europe a couple of years back).

Any thoughts on advantages/disadvantages of running amps on 120 vs 240V would be greatly appreciated! Many thanks!