To the OP, you might as well get the Base+Sport. For $3000, you can't piece together a combo better than what the Sports Package offers you.
To the question above me, that sounds like a good deal. Check out this thread (if you haven't already).
2009 / 2010 Nissan 370z invoice Price
Add up all of the invoice prices of the options that the car comes with and compare it to the price you're getting. If you're at least $500 under invoice then you're good to go!