Easy answer. If you have the cash and a MB is available, get it. Thus have an awesome game to play while you're waiting who knows how long for WOZ. Then,(gasp!) play WOZ and see if it is worth owning. Plus, who knows what else will be available by that time? If you prefer WOZ, you can easily sell the MB to fund the purchase with money left over.
Secondly, WOZ looks very stop and go, which you already have covered.