512, wow. I have a 256 but that is sweetness!
I keep all my data on SugarSync, so I just pointed it at the SP2 and it pulled it down (took awhile though).
If I had it to do over again, or if you don't cloud all your data, then I would plug an external drive into. Your old machine and drag over My Documents / Pictures / etc.. then plug it into the SP2 and repeat.
I don't' know how to do a direct transfer via an USB3.0 cable, but that would be easiest if so.