If you have a fast computer then edit in HD and then when it's all finished export using compressor or some other such software to a lower res - that way you will get better overall pixel depth and quality, rather than exporting an already smaller quality file. I used a first gen iMac G5 and a 500gb SeaGate drive to edit some 1080p in full quality. I then exported in full quality as the deliv was for projection in full HD
If you have a fast computer then edit in HD and then when it's all finished export using compressor or some other such software to a lower res - that way you will get better overall pixel depth and quality, rather than exporting an already smaller quality file. I used a first gen iMac G5 and a 500gb SeaGate drive to edit some 1080p in full quality. I then exported in full quality as the deliv was for projection in full HD