I love CSR, but from what I recall between it and POR, CSR is a little more spread out (which I happen to love, particularly walking around the lovely lake while the sun is rising). I also liked the POR food court well enough, but I really like the Pepper Market at CSR--lots of variety and I will happily pay the 10% gratuity to have someone else clear my plate when I'm done! The pool is also really great at CSR.
Some people also complain about the "magic" not being as evident at CSR because of convention business, but I've never found that to be the case myself. The themeing (sp) is really good, too. Keep in mind that it is more 'desert-like' at CSR than at POR, which is greener, but it's supposed to be this way;, Disney did not just let the plants at CSR die! POR is greener, with more trees and things as one might expect.
The amount you'll save with your AP will be fairly considerable. I'm going 'deluxe' this trip, but in January will be back to good old CSR! I don't think you could really go wrong with either CSR or POR, but CSR gets my vote for best moderate.