If your a "beach" person in the least amount, then GP is the best. We really miss that at Temptations. GPs water is very pretty, but rough. Kinda reminds us of Negril, Jamaica during a Tsunami !!! Never saw a topless gal at GPs pool, HOWEVER, thanks to the rough waves, did see a couple of "accidental" topless women. Not the same, however !!! Orbitz is normally less for us also. The $150 discount really helps. Going to try booking hotel and air separate!! Southwest has some very good deals and the first two checked bags are FREE!!!. Deltas checked bag fee normally adds around $100 extra after all the smoke clears. For the short 2 hour flight from Atl to Cun, you can really put up with just about anything. (besides screaming kids)!!! There seems to be a difference in price between TTR and GP. Sometimes TTR is lower, sometimes its GP. TTR seems to vary its prices more than GP.
Orbitz was about $200 more the Expedia for us. I think it had to do with the USD to CAD conversion. Expedia will quote us in CAD (which I like).