I herd that GPO advanced would include orchestral saxophones. Would these be appropriate in a symphonic setting or more in just a concert band setting? If in a symphonic setting, what would the porportions be like (x amount of saxes per y amount of, say, trumpets)? Porportions within the sax section (how many altos to tenor, etc.)?
I don't know much about orchsetral saxes, so I'm just trying to learn as much as I can about them before attempting to write for them.