Congratulations on your entry into the minister of music position. I would say that the best keyboard to get would...yea...be any of the Motifs. But another to look at would be the Roland VR 760. Its a combination of the VK 7 and VK 8. It's a hott! board doc. You'll be very pleased with it. I got it and I won't trade it for nothing!! Check it out!
you can't go wrong with a motifs,fantoms or a triton.
An excellent keyboard for budget musicians: Yamaha MO8!!!!!MotifES & S90ES sounds, sequencer, etc. for less than $1500!!!