I guess we are confusing questions.
1. Is Brunell an upgrade?
Clearly yes.
2. Is he the long term answer?
Probably not.
So, how much do you pay for a short term upgrade. I'd guess that depends on how close you think the team is right now. If you think we are a QB away, than you might overpay for Brunell.
I'm betting that Wanny thinks we are close enough that a consistent passer like Brunell is worth a high pick.
Personally, I doubt it.