TKG, it's a 40k game. I'm sure you can have fun with it, but if you already own DH1 I would recommend sticking with that until the beta gets ironed out. It's much more zero-to-hero than DH2 seems to be (what with starting at 30+2d10 and all).
Or I could just say: "this character is way too strong for what I want. I know, I'll just make it 20+2D10." Problem solved with a little bit of the old DH creation system.