What would you hook up to a Voice of the theater ?

I need some of your expert help. I inherited a pair of huge Bozak cabinets housing a VOT set up each including one H811B horn and 2 x 15" Altec L woofers with all drivers and crossovers. I hooked them up with a low end receiver and they are working fine. Also got my hands on a Carver tfm-35 st amp. I will like to keep these but I want to be able to set a HT system and cannot decide myself on what to do with a $ 1,500 budget and a 20' x 15' room. I have a NAD 1000 monitor series preamp. I will really appreciate all your reccomendations. Too much reading and so much equipment choices that I am totally lost at this point. Please help!