[ejm3]

Make it easy and start at invoice and work from there. $500 over is pretty good but doable.
They will whine about it but you should be able to get that deal done.
Its very difficult to negotiate holdback. That's how the dealer makes money even selling the car at or near invoice.
Also check for an incentives, There were none when I bought mine last year but you never know.
Edmunds.com is your friend.