Congrats to another savvy shopper!
When I bought my Impy last April, the MSRP was $20.745 or some such, I told them I wanted it at invoice (this was at North End Subaru), and that I wanted to see the invoice and paperwork that goes along with it. The invoice was in the $19,000 range, but I knocked off the port fee and some other miscellaneous fees, and got the $750 off from Subaru on top of that. In the end, I paid in the $18,000 range and felt very happy. It's always so heartwarming to read about someone else's good fortune. Best of luck with your new car!
Deb