There is no telling which resort you will get. It is a luck of the draw and whichever resort has the room.
All resorts have WiFi. Some rooms have it, others don't, but it is available in the lobby areas and other places on the resort.
We were at CTI and had limited WiFi from our Building 1. At CN, CSS, & CSA it is available in all of the rooms. Perhaps they have improved the reception at CTI since November 2009.
I highly suggest changing from the Ritz. First of all Couples is all-inclusive and you don't have to spend another dime once you arrive. Plus the resorts are fabulous and you will have an outstanding vacation and fall in love all over again.
Juliann & Jeff
Jamaica Soon Come