What about booking an AquaClass 192 foot balcony for $2076 and add the beverage package Classic/Premium at $39/49 per day ($546/686 for 7 days).
This would include specialty dining in Blu and access to the spa. The grand total based on your other projections would be $3717 versus the $3,365. Wow, I did not expect this: that Celebrity would be more expensive overall. Who would have thought, that this would be the case?