Hello all...
My first post here, but I figured I should go ahead and chime in.
I have been in the same situation in the past as you when trying to choose between a camera and which system is going to best suit my needs. Without coming across like a jerk, here are a couple of things that I think you should know. (To qualify, I am a DVX owner who moved from the XL1 [still have two of them] to the DVX [only have 1 so far])
Low Light - A complete non issue. If you do not light your scene correctly it will look like garbage, pure and simple.
16:9 - I'm a DVX user, so obviously I am biased in this regard. You need to look at each project as an individual element and decide what is going to work best for your needs. If you decide to use a DVX there are several methods that you can use to follow through with to uprez your DVX squeeze footage. Personally I shoot in letterbox for all of my projects or just straight 4:3 and letterbox in post. It comes down to personal preference. Once again, I consider this a mute point.
Interchangable Lense - I don't want to offend any XL users, but this is also a non issue. You mentioned price doesn't matter, but go to any of the big retailers and price out the lenses for the XL2. They are extremely expensive. The odds of ever getting and using another lense is very small. I guarantee you that 95% of XL owners never purchased or used another lense.
Handling - The XL series has a learning curve. It's handling is weird initially, but grows on you. The DVX has a much lower learning curve, I find it to be extremely intuitive.
Picture - This is where people normally disagree with me, but in general I find that the image from the DVX is much more suited for the scripted indie look where the XL is much more suited for the documentary look. I can defend this position more, and both can replicate either image, it just comes down to tweeking.
Cost - To say that cost doesn't matter, well... either you're very well off or just... I don't know. Cost is always an issue. If cost is not an issue look at some of the $50,000 units. The DVX delivers more than the XL2 out of the box for more than $1000 less. If cost isn't an issue, then get the DVX and the anamorphic adapter and you still have a few hundred to invest into a tripod.
Support - Obviously you have explored DVXuser. I find that the DVX has the largest and most open support network available. This is a great asset.
24p - They tie in this regard. It is this simple. Either camera will shoot 24p which is the most important aspect of these units. The moment you see your footage in 24p you will never understand why you used anything else in the past. It is this simple.
My opinion, I recommend the DVX. I am biased, but still... Look at everything you will need to get. Camera ($3400-$4400), Tripod ($450-$1200), Microphones, Shockmount, Boom, Cables, Windscreen, Fur, Blimp ($1000-$4000), Lights ($25-$10,000). I am forgetting a lot, but money matters.
Just my opinion.
