I'll start by saying 1/$8M is fine for what Ray could potentially give you.
The only thing I would say is, do we know what our payroll is going to be for next season? If we still have a tight payroll to work with, how many Roark's and Ray's can we afford to have, who may end up being unusable? As long as we have enough flexibility that we can spend our way out of some of these potential mistakes come the deadline, I'm good with the moderate risk, high reward game.