Honestly, I don't know if that is that great of a deal anymore. With the recent price cuts all over the board on the A500, I think you would be better off looking for a 16 GB model and adding a MicroSD as needed.
I have seen people getting the A500 for under $300. I'm guessing the 32 GB model will also see more price reductions.
Nothing is worse then buying something, and a week later, seeing it sell for a lot less money. And with the Acer tablets, it seems like the retailers are price cutting them weekly.