Well. there ya go. Different needs for different folksYeah, i think i would be fine with the 256gb hard drive or even 128gb for that matter as i have been using the same laptop with a 110gb hard drive for the last 4 years, 12 hours a day without any problem and i have 30gb left... i save most of my music on an external drive...
Last thing I want to say about the MBP scree. Even though the 13" is supposedly better (Can't say as I haven't seen them side by side) the MBP screen is phenomenal. I could not imagine that you would be disappointed in any way. I think the bottom line is mobility. The MBP is a lot heavier than the MBA. Personally I don't mind it but having something as light weight as the MBA is nice. I've been kicking it around myself. If there was a 15" option I would jump all over it.
Anyway, whatever you decide enjoy. It's such a better experience. Even something as simple as dragging a jpeg to the Photoshop icon in the dock to open it is pretty niffty. There were so many things I didn't know about but discovered once I started using it that gave me a "wow" moment. Not "OMG WOW!!!" just "wow that's cool". LOL!!
Rambling again, enjoy!!