Business class will get you off first which is a blessing as you don't stand too long in queues, but your luggage may still be last on the belt.
It doesn't matter really, you are in Bali, learn to relax and exist on rubber time.
There are always taxis available from the airport, but get a voucher from the airport taxi booth so you don't get taken for more than you should :) :)
I think your flight will be one of very few at that time, so it should all be a breeze.