YEah .. If your buying a Uk .. *A1200*... You may well have to buy a US spec PSU.
England runs on 240 volt ac supply
US runs on 110 volt supply
As far as NTSC (US spec TV standard) .. that would only be an issue if you intened to output to a tv or video... even then.. If you get a decent video, it will detect a Pal signal and convert it to NTSC....
Be warned though... MOST US VCR's are CRAP and only allow a single standard.