My 1 1/2 cents- the Daggerboard has better performance (slightly) due to the reduced drag on the hull, and may be a little better from a maintenance standpoint, but. . . I like the fact that my CB will come up when I hit something. I sail in areas with sand and mud, so the CB just comes right up no problems. Had a friend rent a small sailboat in Pensacola with a DB, a storm was coming that he was trying to beat back- he ran aground with the DB and could not raise it due the pressure on it. He could not get the boat off the shoal. The storm came in and the waves from the storm and the passing power boats put so much pressure on the boat the DB snapped and the boat capsized. The mast then stuck in the mud (not a Mac obviously) with the hull turtled as they all held on to the boat. The mast eventually snapped as they were rescued by a passing boater.
"Um, you remember that sailboat I rented from you?" They pulled it back in with the mast tied to it- what a mess. Anyway...I just worry about backing up my rudders and CB into something.

I like to beach my boat so I like the CB. Not sure if Mac will go back to one though, it doesn't seem many people are having problems with their daggerboards. I don't mind the hump in the cockpit, it separates the dinnete seating floor very well, and with the dinette elevated at window level it makes for a decent view around. I have heard of someone breaking their CB- I think from heavy weather.
All the stuff (nice word for it) in the Mac advertising that they contradict from model to model just goes to show you that it is all a hyped sales pitch. This board is probably the best place for honest opinions on Mac's.
Lastly- Why I like my Mac (1 reason anyway)- I was sailing opposite direction from a keel sailboat, I reversed course, gained and past the other boat until the opposite shore, dropped my sails, picked my way through some crabpots, ran it up on the beach, pulled out the barbeque while the kids played in the water. I am sure it made the other crew watch in amazement as I passed them and then beached a sailboat. Gotta love it.
Jeff S