There aren't that many choices anymore!
CET has links to 40 (or so) Casinos nationwide, so your play gets you offers/comps in those venues.
Borgata is now fully owned by MGM; the MLIFE system will be the dominant system in the near future. [MLIFE while not as vast as CET, has lots of LAS casinos.]
If you want to stay with AC, I've heard that the Golden Nugget has a nice system--personally I don't play there so I can't speak from personal experience.
It's all on what you're looking for that you're not getting from CET. Right now, Borgata is fairly competitive, but rooms can be hard to come by because they are tops. As said, the change to MLife is coming very soon, but who knows how that will actually affect offers. One good thing about MLife is the 5X multiplier on hotel and food spends. Only way I'm leveling up there naturally. Hopefully, all is well.
Golden Nugget may be the best choice. I don't give them much play, but still get BOGO buffets, essentially peanuts for match play (but something), and acceptable room rates for what I give them. If Borgata goes south with MLife, I'm likely making GN or Trop my other AC destination. Trop is getting up there, and people I know like staying there. One day I will, but right now I'm good.
Resorts is apparently easy with the comps and people like it, but it's somewhat lacking in terms of connectibility, though you do have Mohegan Sun. Trop on the other hand has a Cosmopolitan connection if you are premium tier.
Got to agree with Harry. Borgata for his reasons (and hesitation due to what MGM may or may not do to the place).
Trop would be my second choice. I like the slot floor, it's clean, the people are nice, the comps and offers are fine if not even better than fine, and the property is beautiful. He's sunk a ton into it recently and it shows. A nice atmosphere through the Quarter, Hotel Lobby, etc.
I got an offer from them for a 2 night comped suite after last visit (I played Space Attack for too long and now the computer thinks I'm a high roller LOL).
What I'm waiting on is Ten (old Revel). If they decide to compete with Borgata, it will be a win for some of us. Unbeatable views and rooms, and I liked the slot floor (other than that IGT Server-based software. HATE.). And I know I will find @Joey there ;)
I have stayed/played with Borgata, CET & Tropicana. I play the same games, for the same amount of time and make the same max bets.
Here is what my play in AC gets me.
CET, by fair the shittiest. My coin-in might be a little lower here since I seem to lose more (and not cycle as much thru) 3 nights, any nights, $25 in free play and 2 free buffets or meal comps. I was Diamond with them. The free play is usually good once a week, same with the meals.
Borgata. Solid bounce back comps. 3 nights, small suite upgrade (if available) $100 in free play + $50 in meal comps. The free play is nice, but even better is when they stack days. $100 on Fri + $100 on Sat + Mystery money (usually $100) on Sunday as an example. I am Black Label here
Tropicana. Great and diverse comps. 3 nights in a suite. $150 in free play + gift. You can also stack the free play almost unlimitedly. If I stay for 5 days I have $150 x 5 = $750 in free play plus a few days worth of gifts. I am Platinum here
I'm from out of town, I will usually stay in AC for 4 days 3 nights. If I did that stay with CET I'd have a room + 25 in free play and 25 in food plus something worthless to me like a point multiplier.
Same 4D 3N with the Borg will usually get me $500 in free play and $50 in food if I plan it correctly. Sometimes there is a day lag between offers.
The Trop for the same $600 in free play plus 3 or 4 gifts that might be worth $100 total.
CET value room + $50 comps. Borg value room + $550 comps. Trop value room + $700 comps.
Not figuring in my point play which I can eat or turn into free play. Both the Trop and Borg are fair. I sually end up with another $100 or so in point value. CET with their 1 penny back per $5.00 thru a slot is a joke. And if you want to make that free play its 1 penny per $10 on a slot. $10,000 coin in on a machine there gets you enough point play to turn into 10 bucks. Thats sad.