I can't offer any technical advice but some direct experience. I have:
1) a revB MBA with 2Gb RAM, 1.86Ghz CPU and 128GB SSD
2) an 'old' MBP with 4Gb RAM, 2.5Ghz CPU and 500Gb HDD (and a better graphic card than the MBA).
Boot up/shut down times and times to open applications on my MBA blow me away. It is lightening fast in this respect whereas my MBP takes over 30-45 seconds to boot up. I would love to see that response time on my MBP and can only attribute the difference to the SSD.
On the other hand, for intensive processing tasks (my most common one is rendering and editing >10mb RAW files in Aperture) the story is completely reversed. My MBP renders the file for editing in 1 - 3 seconds and let's me keep a fairly swift workflow. My MBA takes several seconds and basically I can't use it for serious RAW editing without becoming annoyed. This assume this is down to the CPU and graphics card in the MBP...
As other posters have said it will be a bit of a trade off whatever you do. Personally I am dreaming about a MBP with a 500GB SSD drive, but I guess I have to wait a while
1) a revB MBA with 2Gb RAM, 1.86Ghz CPU and 128GB SSD
2) an 'old' MBP with 4Gb RAM, 2.5Ghz CPU and 500Gb HDD (and a better graphic card than the MBA).
Boot up/shut down times and times to open applications on my MBA blow me away. It is lightening fast in this respect whereas my MBP takes over 30-45 seconds to boot up. I would love to see that response time on my MBP and can only attribute the difference to the SSD.
On the other hand, for intensive processing tasks (my most common one is rendering and editing >10mb RAW files in Aperture) the story is completely reversed. My MBP renders the file for editing in 1 - 3 seconds and let's me keep a fairly swift workflow. My MBA takes several seconds and basically I can't use it for serious RAW editing without becoming annoyed. This assume this is down to the CPU and graphics card in the MBP...
As other posters have said it will be a bit of a trade off whatever you do. Personally I am dreaming about a MBP with a 500GB SSD drive, but I guess I have to wait a while