T.P.
We went to see "Stomp" at the Keller a couple of years back and sat in, literally, the very back row of the balcony and I felt like I had a great view and could see/hear everything just fine. I actually liked being in the balcony because I got a good view of the whole stage, even the back. Personlly, I wouldn't pay the extra money to sit on the floor level. I'm not super picky about things like that either. Like someone else mentioned, if you are in the back of the theater try and get seats toward the center.