If you really can't go back after playing 2, that's all the reason to play 1 first.It's also what I was leaning towards, but I was afraid you'd say 2 did so many things so much better that there really wasn't any going back or whatever.
Think I'll get myself OS for my birthday tomorrow, than. Hope if lives up to DD.
(Disclaimer: I haven't played 1 yet so I don't know if it's hard to go back after playing 2. Love 2 though, love it to bits.)