I'd prefer not to go for Apple, but will do so if they are that much better.
In my experience,
they are that much better.
Last week I upgraded my long in the tooth mid-2008 15" MacBook Pro with a current 13" MBP with SSD.
I specifically chose the MBP over the Air because among my paying jobs is the need to deliver a DVD of my edited take shortly after the event. The MBP has an integral SuperDrive, the Air uses one outboard through a USB port. I choose to have the SuperDrive internal, otherwise I would have been all over the 13" Air.
If I have any advice to offer, it is to strongly consider an internal SSD for whatever laptop you eventually choose. The speed difference is obvious and IMHO, profound.
My old 15" MBP is now kept at home, the screen real estate is useful. I deliberately chose a 13" MBP for work and travel because it is smaller and is sufficient for my needs away from home. I know more than a few who are very happy with their 11" Air, their criteria was to shave as much weight as possible from their travel kit and still get the job done. Between the 13" & 11" Air, I see little difference other than actual screen size and the SD card slot of the 13" which could be very important for many.
Some comments have been made here and elsewhere about the size of the internal HD. Obviously it needs to be large enough to handle the OS as well as other permanent and semi-permanent articles such as an iTunes library.
One thing I rant about is maintaining an archive and backing-up files. Before I ever reformat my camera cards, they are backed-up, one way or another. Typically I have an outboard portable HD plugged-into my laptop, not only for Time Machine purposes, but also for a second destination for an ingest folder.
When I ingest camera cards via Photo Mechanic, I have one folder on my desk top for working / editing the image files and an alternate folder in the outboard HD just as a backup. Being outside the laptop, if the computer crashes at any point, files in the outboard HD are separate and safe. Once I get home, it is easy to transfer the folders from the outboard HD to my permanent archive array.
My point in this lengthy rant is I do not store image files for a long time on my laptop. Once I have finished a particular job, the image folders are cleared from the laptop and kept in a relatively secure archive. This keeps the HD of the laptop as clear as possible allowing a smaller HD for the laptop to still run as efficient and fast as possible.