We would definitely pick the CSR. We’ve stayed there eight times and will be back in September for our ninth stay. We love everything about it (as did our kids when they traveled with us and we have numerous friends with young children who love it and are planning to go back next year)–from the wonderful CM’s, the food choices, the great main pool, the hot tub, queen beds, sliding doors separating the bathroom from the bedroom, etc. Yes, it is a convention resort but it truly is a benefit as while they are in meetings, the pool and buses are emptier (and the CSR is not the only convention resort at Disney – the Contemporary, Yacht Club, Boardwalk, etc. are also convention resorts).
We’ve not stayed at any of the other moderates, but we have visited them all a number of times. The CBR would be the absolute last moderate we would pick – terrible food court and don’t care for what they did to the rooms at all. Plus, we go to the beach every year before or after our Disney stay and really don’t need a “tropical beach” theme.