The 1050C is a non-postscript machine and comes without a hard drive - Where as the 1055CM is Postscript has a hard drive as standard and more memory - Hope this helps.
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I bought a plotter from a company called A D Young - The service was really good and they offer 12 months support on all products. I would recommmend www.adyoung.com as a good starting point in your search
