You are putting a lot of

You are putting a lot of light on the subject, even with softboxes. I have a similar light kit, and I generally run in a smaller room with only three bulbs on in my key (using only one silk), and one or two in my fill (using two silks. I do use two lights, as I generally prefer a less dramatic look. I get a nice even light, with just a bit of depth and highlights on the talent.