MATV system balancing

I work in a large venue which has close to 1000 TV's. Last year we upgrade most of the tubes to LCD's. We also updated the satellite system to receive Directv HD using a Com1000 unit plus integrated the local cable feed SD and HD. With the cable providers assistance I went to each amp and balanced the rf signal through-out the building. I need to add 16-20 new TV's onto the system how will this affect the balancing and how do I determine what size taps would I need to install. I have 4 different levels I need to install these tv's 4 per level 2 per level off of the north vertical trunk and 2 per level off the south vertical trunk. Both trunks are fed off separate amps at the head end. Any thoughts!

I'll come up with some kind of drawing. All equipment (taps,amps,splitters etc.) is Blonder Tongue. I'll get the specifics from the amps. As for type of cable I plan on using is the building standard RG-6 quad shielded. The longest run being less than 150' to the easiest access to the trunk cable.