Excellent choice, Turnage is probably my favourite composer! I reckon momentum would work well. Coincidentally thats the track im listening too!
Also Steve Martland and Louis Andriessen would be interesting.
I would have loved to have heard Stravinsky and Shostacovich write for band.
For A level exams you're generally allowed to play doubling insturments. I.e. and oboist could play a cor anglais or a flautist a piccolo etc. However baritone may not be considered a doubling instrument to euphonium so be careful with that!
As a music technology student the most interesting point as far as recordings are concerned is the aesthetic produced. Steve Mead points out the in some recordings you "feel" like you're in the middle of the concet hall some fromt eh conductors perspective and others from the 3rd cornet seat...
I would disagree with this... Many people going to orchestral concerts go to see the repertoire performed... Instead of people going to see the band as they would with great brass bands they are more fans of the ocmposers!
I would not normally go as far as manchester for a concert but I am...