Poromene welcome to the forum
Both Alcohol and Blindwrite are currently more up-to-date with current protection schemes, than CloneCD. It depends on the games you want to back up.
The image files you should use depends on which program you will use to burn them after that. I also use CCD to create images and emulate them with DTools, but you can do that with other image types and software also. Alcohol also introduces a virtual drive if you want one in all program.