Thank you Craig Seeman
Before I go for a more powerful than the iMac, I will be making some tests with the iMac, just to be sure. I would like to try Apple first, then the other options (I find that PC gets tired/slow more easily than the Mac).
Now, I looked at an 8 Core MacPro with GeForce (5200) card, 500 GB, plus screen, etc. The cost is around £3,000 ($4,360). The question is:
With this amount of money would I not be able to buy a proper professional equipment to do mixing/editing? Something like a Video Mixer (with Chroma Key feature, etc), having at least 4 (I/O composite, SD, SVideo, etc), audio I/O, preview output, etc?
Bearing in mind that if I had e video mixer I would need also a good Video Recorder (for not to lose frame).
If you know, could you give me some options? Or for the price, would the MacPro be more reliable?
Thank you.