Can I do better on this deal?

Hi. I am currently in the process of ordering a 2013 BMW X3 28i. I feel like I could possibly get a better deal. This is also my first BMW purchase.


Jet Black
Oyster leather
Fineline Wave

Packages:

Premium
Technology
Convenience
Sport Activity
Cold weather I

MSRP is $49,195

What dealer has offered:

$1,000 off
$1,250 (USAA discount)
$1,400 (trade-in, they'll give me $10,000 but I owe $8,600)

That puts it at $45,545

CA said there was a $399 doc fee, so then it would be $45,944 (NOT counting tax+title)

Now invoice according to these sites:

BMW config- $45,420
Edmunds- $45,230
KBB- $45,230

So I'm roughly $524-$714 above invoice (INCLUDING doc fee but NOT tax+title)

And again that is WITH my trade-in also.

Should I be able to get to $524-$700 above invoice WITHOUT even including my trade-in yet?

So can I do better than this deal?

Any help would be greatly appreciated!!