Hi Mark,
I think that if you are looking for quality video as well as stellar stills; you should go with Canon; although when I say that I am referring to their SLR's; not the SX-20.
The primary advantage of an SLR is **SENSOR SIZE**!!! You can count pixels all day long; but unless you have a decent size sensor (the place where the pixels are placed) you will always be at a distinct disadvantage. If you haven't already...research **SENSOR SIZE**. I tried to find a good link for you; but I don't have the time right now.
The Digital Rebels are good cameras that shoot HD Video and stills. They are a lot more money than an SX-20; but it gives you a sound platform upon which to grow with lenses and other accessories. Even filters are difficult to use on an SX-20 type of camera.
BTW....what ever happened to the tutorial that you put up on gelcoat restoration? I want to send it to a guy I met last week. I followed a link to fiberglassics...but couldn't find the page.
Thanks, Chuck