Thanks for all of the suggestions. Just got back from the cruise yesterday.
So... overall, a very enjoyable experience. Very rough waters between Galveston and the Keys. Really glad the wife and I had the patches. Others in our group did not have them and became very queasy to the point of staying in the cabin for several hours during the roughest seas.
Regarding the musical entertainment, slim pickens. There was an on board pub that had a one man acoustic act every evening (same guy the whole cruise). He catered to the whatever hot chick was in the pub at the time so I didn't get off to most of his stuff. There was a decent band with a small horn section that played on a small mid-ship stage. They seemed to have not played together much and it showed. However, there was a house band that roamed around the ship's venues that was really good although unusual. All members (singer, keyboards, drums, guitar) were Chinese. Man, they could play anything and play it well. Did everything from the Eagles to Journey to The Carpenters and everything in between. The guitarist was a Strat player and man did he make it sing! They also performed as the pit band for a couple of the theater shows. Very versatile.

We loved the pub crawl in the Keys. I was coerced by our group to take the stage with one of solo acts at a pub to sing the harmony part for the Eagles "Take it Easy".
The excursion in Freeport BH was pretty lame as they taxied us to "town" for shopping and lunch. We basically turned loose in a small area of shops and restaurants about a city block in size where were were captives for the hawkers there. Only lasted there a couple of hours before returning to the ship.
Excursion in Nassau was at the Atlantis resort. Ok if you are into waterparks. This excursion included free lunch. Of course, at lunch time we found that we were very limited as to the food places we could visit and even the items we could choose at those places. Pretty much hot dogs and hamburgers were the rule.

I am not very picky but the food aboard ship was lackluster. The dining room was usually pretty good. The buffett was pretty much always the same items and these were just so-so for me. Of course there was always the pizza and burger joints to fall back on and they were always open.
The 7$ drinks really add up over the course of the trip so between those, the casino wagers and the spa massages that we had, we had a pretty hefty bill at the end of the cruise.
Bottom line, we would consider cruising again but would opt for the shorter 4 day cruise to Cozumel.
We were pretty burnt out by the last 2 "fun at sea" days aboard the ship.

Todd