Maybe I just missed something, but when I migrated from a PB to a MBA I intended to use the Migration Assistant. After all, firewire target mode allowed me to clone one PB to another and make a virtually identical copy of it very quickly in 2008 using MA. No muss, no fuss.
That plan seemed OK until--"Let's see. Where is that firewire port again?" Since I had neither that nor an ethernet port on the MBA, it seemed like just restoring from TM was the simplest thing to do.
Since the SSD on my MBA was smaller than the HDD on my old PB, I pared down the PB with some spring cleaning first, then backed it up in TM, and restored that to the MBA (a TM backup is not strictly an "image"). That seemed to work about as well as MA had for me earlier.
So that would be my recommendation. Is there a way to use MA with an MBA? I guess since yours is an MBP, that you have options. I've used both, and both work pretty well.