I will be getting a silver 2012 Elantra mt with the AC package. It should be at the dealer sometime in late June. They are no longer making the 2011s and there are none in my area except for one bronze with beige interior which I don't care for. I will be paying about $650. under sticker, the actual pricing for the 2012s isn't available yet but mine will be about $300 more than the 2011 price. I think a louder horn is the only change on the mt! Hopefully I will get excellent fe on my commute. Time will tell. Hopefully I get the car.
FWIW I wasn't interested in the auto-dimming mirror in my GMC, but it's by far the least annoying auto-anything I've ever used. It's dim when I want it to be and not dim when I don't. So, even though you'd rather not pay for it, hopefully it will perform like mine and at least you won't pay for a manual replacement.