Just to say, I'd strongly recommend that you install the Canon Raw processing software Digital Photo Professional (DPP) while you are weighing out your options for upgrading.
DPP has gotten quite a good reputation for being a fast, easy and effective Raw processor, and can even be great for someone who typically uses Camera Raw or Lightroom. I'm a long-time Lightroom user but have DPP and use it a lot for quick conversions for different things. One big plus is that by default it uses your camera settings for a quick "like the jpeg" conversion, and then you can change things around as you wish.
The alternative to all the above is to use the DNG converter from Adobe that will handle the 5D2 -- you can set it to produce files that work with CS3 ACR.
And, yeah, I've heard that the 5D2 meters well, meaning that Auto can produce nice results. The downside to me is total lack of control of anything, meaning not just challenging exposure issues but also struggling with the automatic focus point choices and not being able to control Aperture/Depth of Field would suck big time for me. P would give you more choices. Just sayin'.
I will still do my major shoots in RAW+JPEG just to be on the safe side though.
