Luke - i think you'd be better off keeping the Quadra as running two heads with a fixed ratio off a single pack is too much of a compromise. A 2nd head is good of course for redundancy purposes especially if you're getting paid for what you do.
I agree, especially if you're getting a ringflash. You'll probably want to power that with its own pack.

. My girlfriends going to hate me
If you miss it, Rob and I would be happy to send you a cooler full of prime, NY-winter black slush.

