I can vouch for
Buydig.com, at least from my experience. I purchased a Canon ZR-40 from them a few weeks ago for less than $460.00 shipped - great service, fast, no complaints. They didn't even call me trying to sell me additional stuff, like many online camera/video places do! I'm always nervous choosing a new online vendor when ordering such a big purchases, but like you I read many reviews on this company and found the majority were positive - there are a lot of fly-by-night vendors out there selling the exact same stuff! They are dirt cheap too, real deal in my book.
You've probably read a lot of reviews on sub $1,000 miniDV camcorders now, you probably have a good picture by now I would think of the features, comparision thing? The ZR-40 has an 18X optical zoom, little more than the JVC model. I like it so far, lots of features, learning curve doesn't seem that bad - it's small even for a miniDV camcorder, light.
You will find however if you do your homework that there is a lot of feedback issues concerning the motor drive noise problem w/the ZR40/45 and 50 series. Here's my opinion. I do notice that the camera picks up and records the motor drive (slight humming noise), this is very evident in low-noise/quiet environments. This seems to drive some reviewers crazy, others it is a minor (and fixable via external mic.) problem, and even others don't even care.
I myself plan on eventually editing most of my footage and adding background music/audio. Most of my video is also outdoors with plenty of external audio anyway. I do not predict that this motor noise prob. will be a prob. for me. If however, you plan on filming sleeping babies and that sort of stuff, it might be distracting. Adding and external mic. to the camera seems to fix this issue though.
Either way, good luck with your decision.
-VTrider