Based on their "sale" I would say that you should go in and see what you can get. The reviews on their Service Dept is less than good so I am not sure I would ask for that. They did include an extended warranty which is about 700.00 unless you knew of the hookup which hardly anyone does. Also I assume a lot of the prices you see listed by others do not include set up, freight, taxes, tags, and other "associated fees".
In addition a lot of guys get the factory discount included in the price, you have 0% interest and I am not sure if you can get the discount and 0% interest. If you did not get the 2,000 factory discount and put little down in the long run you will be better off taking the 0% interest. Taxes in CA are high from what I recall. SOOOOOO, 0% instead of 2K rebate, 700.00 Extended warranty, CA taxes, etc and you should not feel too bad.
Do not let it ruin your excitement, it is just money in the end. TWOWHEELADDICT posted some god advice, if you have that possibility then use it as leverage.