I'm getting a new 17"er soon and I've got a blank 7200rpm drive waiting for it. With all this freshness I want to put something really new in it. Naturally, with the new SL beta out I'm considering it. I do a lot of heavy graphics work, though, and I'm wondering how wise it is. Windows Betas aways seem usable day to day, I imagine Os X would be better. Any opinions?