I am currently trying to decide which of the following models to go for: Panasonic DMR E95 Pioneer DVR 720 Sony HX900 At the moment I am tending towards the Pioneer. My main question regards Picture Quality in the various recording modes. The input will be via standard terrestrial aerial, so I do not see the need to record at the highest quality. Which of the various recording methods will be equal to or better than VHS? On a slightly different tack, as these machines use hard disks, and you will be constantly creating files and deleting files, is there some sort of feature to 'defrag' the disks? After all, we defrag our PC hard disks to improve performance, and I assume that the HDD recorders will suffer the same degradation in performance over time. Anyone care to comment?