I love Panasonics and I don’t care much for Canons. Having said that, I really like the native 16:9 and 24p of the XL2 and, as you said the interchangable lens. I think the audio is better with the DVX100B. If you are going in that price range, there is a lot to research. Personally, my next camera is the Sony EX1, but that is another $1500 more that either of these two.
Like I said before, make your needs list and check out the reviews. Videomaker is pretty good at giving reviews, but I’d also check cnet.
I think you are thinking in the right direction.
