I had a theme park view room in the tower for a couple of nights last month and it was one of the most magical stays I've had - I would just sit on the sofa and gaze out at the castle from my room, at dawn, in the day, at dusk, at night... Plus fireworks from the room (with music from the TV) was fantastic. And I'd just sit at the balcony looking at the monorail going from GF to MK to Contemporary, or even watch out for the MK train going along the outside of MK.
I usually never bother about the view from the hotel room, but I'm really glad I splurged out for a couple of nights theme park view because I just got so captivated by the view for this room. Definitely a highlight of that trip.
Depending on how many nights is your stay - you could perhaps split stay? Spend a couple of nights in the tower and then a few nights in the garden wing (or elsewhere)?