I did standing room for Spamalot and found as far as view goes, you do miss some of the top of the stage, but I did not find it detract from any of the performance. The distance from the stage to the back of the theater isn't that long. Where exactly in the orchestra are you looking?
But Front Mezz row B is a really good seat - because you are in the front you will have a full view of the stage...don't see what would be cut off.
"We like to snark around here. Sometimes we actually talk about theater...but we try not to let that get in our way." - dramamama611