Pretty good list.
For what he's asked to do, bump F-rod to tier 1. There aren't too many relievers in the league better than him.
Though he's won a Cy Young, I'd bump Zito down to tier 2; bump Beckett up to one (there's not a youngster, besides Prior, I'd rather have than Beckett).
I'd put Peavy in Tier 2 as well.