We really don't care what kind of ducks. Mallards would be nice since we don't get a chance at many where we hunt. Mainly dark geese is what we are after.
Just based on what you want to kill I think Kansas is a no brainer. Mallards galore in January and 8 dark geese per day (I think 2 can be specks). Hooray Ranch is probably your best bet for really great hunting but it is going to cost quite a bit I am sure but if I had to guess it will still probably be in your price range. There is also plenty of smaller outfitters in Kansas that have plenty of success and the cost would probably be half of what it will be at Hooray Ranch.
Besides the above mentioned High Caliber you could also try Prairie Thunder Outfitters, although I have heard mixed reviews about them.
Is Oklahoma out of the question? Might save you a couple hours of driving and the hunting there is just as good as Kansas and you can shoot 8 dark geese there as well but I believe only 1 speck.