Yay, my fav subject.
Either of these would be great. On the Dream they have the virtual porhole which looks really fun. We are booked in that type room (Cat 11 -deck 2) for our 2011 cruise.
The Ocean view is nice to have. If it were on the Magic I would say go for the oceanview on deck 2. That is what we had cruising on the Magic our first cruise.
But, since it is the Dream and a shorter cruise I would say save the money and do the inside cabin. The location will be nice and having it be your first Disney Cruise and on a new ship, no less, you will not spend much time in your room.
I hope you really do go some day.