thank you for the help
is the a lot of difference between:
a. Rev B SSD model and Rev C SSD model?
b. Rev C HDD model and Rev C SSD model?
Yes, the HDD in MBA's aren't as great as normal laptop-grade HDD.
So, Rev B SSD vs. Rev C SSD, you won't notice much difference, really. Some benchmarks in the early days even showed Rev B being faster...
(Please correct me if I'm wrong and that was proven to be false, kind of a faded memory)
But HDD vs. SSD, is a pretty big difference.
I'm a guy who switched from uMBP15 to a MBA Rev. B with SSD then to the uMBP13 with SSD... And I think MBA did most of the stuff that I wanted it to do.
But I do a lot of VM stuff so I just needed more RAM and I actually use the optical drive quite often, so the uMBP13 worked for me.
It's really up to you. MBA is a great machine and I think it's the best ultraportable laptop out there without a single direct comparison.