Ditto. GET THE SECOND ONE!!!
Assumng they are the same price, which I highly doubt, the second one is much better. RAM is easy to swap in and out. The rest is pretty much impossible, and one gig of ram is probably enough. Especially if it's in one slot, not 2x512, which would be somewhat annoying if u want to upgrade.
And yes, you can get an apple guy to stick in the extra ram, and if u buy it from them, who knows, they might do it for free!
Although installing ram is hardly difficult. Consult the manual.
Yes the edu discount applies.