I'm currently working on a second version, which includes another viola part (and therefore a bit of reharmonisation), and, yes, more dynamics! (something which I've always been far too lazy about...oops)
In reply to Flint's comment - I'm also a woodwind player, though I am a clarinetist mainly. Oddly enough, this meant I found writing for sax to be a bit of a challenge, mainly due to it's relatively limited tessitura (it can't even do 3 octaves...rubbish

). But I do have some idea as to how wind instruments are written for, and any guidance from you as to how to make something more "saxophone" would be very much appreciated!
I know alot of sax music makes use of the instrument's jazzy and "shmaltzy" sounds, but I chose the soprano sax deliberately for it's pure, singing tone.
Thanks for all your replies,
Andrew