Surely the store would do a price match??? Considering you're getting Drake and Ratchet, that's two platnum off your list. Approach the store that sells VC and ask them if they'll consider price matching the $728 deal, tell them that you will also be getting all the other games you mentioned and maybe a second controller (if you need it) and ask for the best deal they can give you.
Talk to someone with authority, it's possible to find sales person with authority even in big chain stores like JB Hifi, I'm very positive that if you're also looking to get a peripheral or two you can get an even better deal. Don't be afraid to talk! Retail is not always as black and white as a price on the catalague
edit: the store should still do a price match even if you just plan to buy the $728 deal plus VC to start with, most gaming specialist store is unlikely to turn down a genuine sale like this.
