Hey,
well, I'm in a similar boat. You should be fine with "just" a job offer! I talked to my embassy and they said that affidavit is not required anymore (and also that the yearly minimum on your account is for the sponsor and not DV winners), UNLESS the consular officer determines that you're unlikely to be able to support yourself when you get there --if you don't know much English or something like that. It obviously helps if you have some money on your account.
Hope it helps.
2008EU00016XXX
Interview date March 6, 2008