In my opinion, at that price point the cameras will pretty much provide very much the same in terms of features and quality. Given that DV is a mature product, you'd expect the technology within each of the cameras to be pretty much ubiquitous. I would suggest you opt for (1) the camera with the latest release date and (2) one that fits your needs aesthetically, for example the one that feels right. In my opinion this will outweigh any percieved gain in video quality at this price point.
However, if you do want to compare in terms of performance, I recommend you look at the reviews on camcorderinfo.com. However, note that although they give a score for each camera, this will be at the time of release. It's often the case that newly released cameras would score comparitvely highly if released a few years ago. Which is why I would stress chosing a camera with the newest release date.
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MiniDV, what to buy... 
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