My 2 cents -
In my experience, I've always felt as if Sony is really the standard by which everything else is compared.
The biggest issue I've always had w/ "prosumer" camcorders (especially DV) is low-light performance. With all the new auto gain controls and "pushing" of the video, I find that most single-chip (usually 4k-7k resolution) cameras lack good low-light resolution and focusing. Sony really has an amazing take on it and readily out-performs Canons and JVCs. If you're doing much interior or low-light shooting, consider an HC40, which is a newer model with most of the bells and whistles (audio in, analog-to-digital) while still being under $600.
Also, check out the new JVC "Celebrity" series, which are a couple of hundred of dollars less and are supposedly the first real competitors to Sony's great low-light and focus performance.
The Panasonics, especially the ones with 24p capabilities (VX1000/3000) are amazing, if not pricey.
All of my experience with Canon has shown them to be a little flaky with focusing (especially manual focusing, even on SLRs, like the XL1) and grainy in low-light. Also, they're ergonomically funky, in my opinion.
The thing is, unlike a lot of technology that have "deals" or "sleeper hits", camcorders seem to really be about getting what you pay for. Sony's are most expensive (for prosumer levels), but really do perform fantastically.
cheers,
n.