2108 should be a very convenient location. Close to the Aft stairs/elevators. No connecting door to an adjoining room. I'm sure you'll enjoy that giant porthole window.
All of the category 7 cabins are aft. I like deck 7 for category 7's. You're close to the big balcony on the back of the ship, and an easy walk up to deck 9 (morning coffee!). Since all of the cat. 7's are priced the same, I like the higher deck. Others like to be closer to the water, so deck 5 would be a good choice for them.
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