When you ask your attorney, he will likely tell you that the title company will not issue title insurance on real property transferred with a Quit Claim deed. The reason it is basically is saying that the grantor is giving you whatever rights he has, but doesn't warrant he has any rights and won't stand behind a claim against you in the future.
The title company can issue title insurance if a Warranty Deed is granted by your soon-to-be ex-husband, and if he doesn't give you one now, he'll have to sign paperwork in the future that is a Warranty deed. So, basically the Quit Claim deed is worthless for future use with some minor exceptions.
Have him sign a Warranty Deed to transfer the title; however, if he still owes a balance on the land, that may trigger the "due on sale" clause in his financing papers. If the mortgagee insists, he'll have to pay the balance immediately or else they will foreclose, even if he is making payments on time. These days mortgagees are not typically pursuing people in a case like this, but that is no guarantee.
Worst case, you'll have to pay off the balance on the land and do a normal closing.
Your attorney (or one at a title company of your choice) can advise you what the best course of action is.