Somehow, I suspect you'll be seeing an awful lot of encounters WAY above your party level, or critical situations that you will be expected to be able to handle. Your DM probably has some plans to throw way over-powered stuff at you, based on the back-story you gave us, and expects that the goodies he's given you up-front will allow you to compensate.
I'd propose that, before you get any new toys you use some of the cash, or your 20-for-a-turn amulets and get Commune cast, to get some divine guidance on how you're EXPECTED to use the cash, and what you may reasonably expect to need in the future.