I too am looking at the DVX100B and asked a buddy from Australia who had one his opinion. This is part of what he sent me today:
I say go for it. They are awesome cams, probably the best SD cam ever produced.
Low light is amazing, also because they are "B" models, they have 16:9 squeeze mode, which is how all the GS series cams achieved their widescreen pictures.......Just shoot in squeeze mode and you'll get perfect 16:9 footage for web upload or DVD.
I then asked him about a clip from his site, and he said it was shot with his DVX last year. Here's the link:
When I was researching this whole "squeeze mode" discussion, it had me confused and hesitant. To me, it sounds like a poor choice of wording, for what the results are. I am very close to going ahead with my DVX purchase now.
I have the next step up from the DVXB, the HMC 150. Its HD shoots to inexpensive SD cards. It is barely barely used! Comes with all original accessories except the remote, Plus large long life battery, 32gb premium SDHC card, UV filter, Polarizer, and a Extended Warranty with 2 years left. I am in San Diego Price is $3200