Seems to me that having as much cash as possible available for a down payment is your best bet. Having a bunch of cash will maximize your flexibility at closing time. If you have well over the $15,000 pay-off figure available at mortgage time, you can pay it then and there if they request.
Once you get the mortgage, you can kill it off then, if you still have the funds, which will free up that $200/month to help on mortgage payments. Although even then, there's a lot to be said for pre-paying on the mortgage instead, depending on the difference in APR's.
* Credit is a wonderful servant, but a terrible master. * Who's the boss --you or your credit?
FICO's: EQ 781 - TU 793 - EX 779 (from PSECU) - Done credit hunting; having fun with credit gardening. - EQ 590 on 5/14/2007