Thank you very much. I will look into both HDPlex and Macintosh, although I know nothing about how to build a PC on my own or to install a Macintosh. I think it will be worth it the time and effort to learn.

For the last 12 years I've been working on a totally silent iMac which produced no noise at all (or at least I couldn't hear any). But now the moment to replace it has come, since it no longer meets my software requeriments. Problem is, I can't afford a new iMac with the hardware I would need (it go...