Thanks for the feedback, KT! I was attracted to the a cappella for a number of reasons - and the lyrical pleading was so gorgeous I was thinking how could one say no? Hence, the positive take. I looked for a major key that was as close as possible, while retaining what felt like important intervals, then used Waves Tune. I actually started out with something that was relatively minimalistic - and may have run to distraction (hmmm, maybe reflects personal state right now)?!