By all means, get the MXT Pro. Then see if you can get the dealer to swap out that 12" coil for the 9" one. As you add coils, you will likely add DD or SEF coils, negating the need for the 12"er. Don't go to the MXT if the dealer says "same machine, different coil." Simply thank him/her and get out quick. The extra features on the Pro are well worth the difference in cost. The 9" coil just makes it easier to handle.
HH