The Borgata, Trump Marina and Harrahs are nice casino/hotels, the only problem is that they are away from the other casino/hotels that are located on the Boardwalk. Ballys/Wild Wild West @ Ballys, Claridge, Sands and Ceasars are mostly located in the center the Boardwalk where you come in from the Altantic City Expressway. Ballys is nice. Tropicana isn't bad, but that and Trump Plaza, are futher down on the right of the Boardwalk. Trump Taj Mahal, Showboat and Resorts are further to your left from the Bally's, etc. Taj and Showboat are both nice and sort in a more quieter area of the Boardwalk.
If you stay at one of the casinos on the Boardwalk some connect where don't have to go outside to get to them. But for the other ones they are walking distance or they have shuttles, etc. For entertainment - AC is not Vegas, but there are different entertainers that appear or some of the casinos have local bands that play and nightclubs.