I believe the majority of lodge tower rooms do overlook the gardens. SagoCay is probably the only building that would have these rooms with a marina view. Due to the slope of the roof, the top floor lodge tower rooms do not have a balcony.
I would choose the building you want based on your personal preference to location. Sago Cay is convenient to the main building and transportation, but a 2-3 minute walk to the pool. Conch Key is closest to the boat dock, but furthest from the main building and beach. Big Pine Key & Boca Chica are steps to the pools and convenient to the main building.
Tammi