contemplating getting a MBP over my 13" Air but a few questions. 1. 1280x800 vs 1440x900. How much will I miss the screen real estate? I do love the Air screen. 2. I use my laptop as a portable and use the following: Quickbooks, Office Suite, Pixelmator, Safari and thats the majority of my usage. Will I see a marked difference coming from the air to a baseline 13" pro? 3. How badly will the 5400 RPM drive bottleneck the system? Will the air be faster at most tasks because of the ssd?