Oceanlee - I have not yet been on the Emerald Princess, but have stayed in the AD minisuites (those on Emerald deck) on Diamond, Crown, and Star Princess and would NOT choose anything else (short of a full suite)! If you can book far enough in advance, get the very back one on either side for the extended balcony.
The great thing about the minisuites on this deck is that the balcony is completely covered and private - unlike the completely exposed ones above on Dolphin deck. We have never been disturbed by Club Fusion or any vibration. We actually have the last cabin booked on the Emerald later this year. I think you'll love it!