Respice, Domine again

Well the first draft of my motet 'Respice Domine' is finished and possibly the last as well. After much soul searching, (and not a little trouble with FINALE), I transposed the piece down a little to move the altos into a more reasonable tessitura. I still can't decide what key to notate the chromatic opening in, but I've opted for a scheme which, if not truly 'Correct', seems to be the easiest to sing from. Though no doubt, when we actually start singing it, I will come to rue whatever final decision I make.