Check out the GSZ thread, we've discussed using other win conditions in the deck. My stance on it is that making 20 mana and bane firing your opponent out, or makign 15 and casting Emerakul is just too easy and starts to encroach on the other decks out there that already do the same thing (but usually better). Playing BSZ as your win condition means that once you start to go off, you shouldn't have too much of a problem winning through any situation that your opponent could create, and you don't need to worry about your opponent gaining a ton of life if they are a collected company type deck or soul sisters or whatever.
Thx.
Edit: Maybe with " Wilderness Reclamation " or " Finale of Devastation " ?