I'd recommend CSR! Besides having a great main pool area, CSR also offers many deluxe amenities at a mod price.
CSR has queen beds which is as plus!. The rooms have been recently renovated and are gorgeous.
CSR has a fitness center, spa, tanning beds, a sauna, salon, full menu room service and a night club.
CSR has a sliding wooden door separating the sink area from the room instead of a privacy curtain like the other mods.
CSR has the same toiletries as the deluxes (except GF). CSR has separate shampoo and conditioner instead of the shampoo/conditioner combo at the other mods and values (a small thing, I know, but it means I don't have to pack shampoo and conditioner).
CSR has the largest hot tub of the mods and one of the longest pool slides on Disney property. The pool, slide and playground area is great.
CSR has terrific transportation that is not shared with another resort.