Basement insulation strategy – GreenBuildingAdvisor

Hello, I recently decided to insulate my basement. After reading several blogs, I have decided to go with the continuous rigid foam strategy. I have a couple of options as far as used or factory seconds near me. I have Paper/Felt faced polyiso  4×8 1 inch at 10 dollars a sheet and 2 inch are 20 dollars. EPS unfaced 4x8x2.25 for 300 dollars a bundle and there is 20 sheets in a bundle. Factory seconds XPS 4x8x1 for 10 dollars a sheet. I am concerned with inward vapor drive and am wanting to stop it as much as possible. I had previously asked about just using the polyiso but was concerned about vapor causing mold and was advised on poly against my block wall. I was also thinking of doing a fluid applied vapor barrier as well. Just trying to figure out the best strategy with what is available to me. 

Thanks,

Corey