To be honest I would buy the camera, and supplement my pictures with a few shots from Photopass.
I have to be honest, I view Photopass as being very hit or miss. If you find a very experienced Photopass photograher, you may walk away with some great shots. But the majority of the pictures that I have seen from Photopass are overexposed, underexposed, blurry, etc...
It is not my intent to insult anyone....but for me personally I have found that the more I learn about photography...the more I learn about lighting, exposure, composition, metering, etc... the less impressed I am with pictures from Photopass Photographers. I do not mean to sound elitist or snobbish, that is not my intent. But my memories of Disney are important, and I want those memories capture with properly exposed, properly composed, non-blurry shots. Therefore, I would not want to become 100% dependent on Photopass to capture those memories.