I know that this is not what you asked for, but I thought you'd like to know this information before you make a purchase:
I ran extensive tests on the 5D3, 5D2 and the 7D with ML raw and I can tell you that I thought the 7D handled raw recording better than the 5D2. Moire is an issue for both cameras, and trying to get rid of it means having to soften up the detail quite a bit which IMHO takes away the biggest advantage of shooting raw (i.e. more detail).
If moire is truly a concern of yours, I'd advise that you consider grabbing a 5D3.
If you do go with a 5D2 or a 7D, you should look into purchasing one of those anti-moire filters, but that will raise the price up of your total purchase.