Hi,
Well I have stayed at CSR, and POR.
I have to say between thoses I would go for CSR only if there are only adults going.
It is a beautiful resort, but it is not as Disney as the other. (IMO)The pool is really nice and it seemed quiter then the other.
Now if you have children I think POR would be better. The pools there are more kid friendly. POR would also be better if you have 5 people going because they are the only mod. resort that allows 5. They have a roll-away bed in the rooms.
Personaly we will be going to the CBR this summer. We have never stayed there , but I have heard alot of good things about this resort. there are going to be 6 of us so no matter where we go, we have to get two rooms. Except for the HAHs or the FWcabins. They are not cost effective for us though.
It just depends on ahow many are going to go with you and what kind of themeing you like CBR is tropical, POR is old south, CSR is southwest.
I think they are all really nice. I havent stayed at a wdw resort that I didnt like for one reason or another.