Hi ann135, and welcome to cruise-chat.com! I'm glad you're enjoying the site -- as you said, there is a lot of great information provided by many knowledgeable people.
Regarding your upcoming cruise, here are a few answers:
Celebrity's prices for drinks may be found
here. (This is certainly a rough guide given the "and up" figures.)
And, here is the lines'
Guest Alcohol Policy. So, the official word is that you may bring wine and champagne onboard (2 each) but not hard liquor.
As far as making the trip more memorable, might I suggest dining one evening in the alternative restaurant, Normandie? I usually don't recommend the cruise lines' extra-fee restaurants, yet Celebrity does a superb job with this and we felt it was worth every penny (and more) on our last two Celebrity cruises.