This debt may be an entirely nondischargable debt in a Chapter 7 bankruptcy as being connected to alimony/child support (including the attorney fee portion). In a Chapter 13, it may be a priority debt as connected to alimony/child support and would be required to be paid in full through any Plan.
In some states, you must file an adversary proceeding in a chapter 7 to have the court decide whether the legal fees are eligible to be eliminated in the bankruptcy. The child support & obligation to pay the school expenses & medical expenses would be a "no-brainer." In a Chapter 13, you must file a claim to make this determination as to the attorney fees. As to the entertainment center, my gut reaction says you would be out of luck to get him to pay this, but anything is possible.
I would recommend contacting a creditor's attorney in Florida for specific legal advice.
Hope this perspective helps!