Buying a New Car

[Beest]

buying another car to satisfy the ever growing number of drivers in the family, I'm zeroing in on a Mazda 3 (isport, manua hatchback,with preferred package, in red)
zoom zoom


So questions, mostly for Jim I guess:
Through AAA you can get a certified true car value, 8% below msrp on mazdas ( different on different vehicles), no negotiating, they are contracted to this price. There is also 0% financing on 60 months, and $1000 from the manufacturer.
Is this just a scheme, could we try and get better than this?
We're not intending to put any money down, we can use that cash for other things, but would that help in some way besides lowering the price and payments.

We don't have a trade-in since we are expanding our garage, it's been a devil of a job getting a car at all since nobody stocks manuals. The hatchback mazdas sell as soon as they come in, so the dealer isn't hurting to shift them, we are probably going to have to order.