Thompson = big risk, low reward
McCline = a possibility, but not a a good one. I would choose a medium heavyweigh first before jumping in with a giant, even a mediocre giant.
Arreola- Not gonna happen. Haye would destroy him right now and I think Chris's people need to step up his competition a little before they throw himin with Haye.

Brewster and Rahman are good choices, but I'll add one more name - Calvin Brock. Younger, beatable, and would probably travel for a good payday. The guy has future after boxing, and he's smart enough to know by now that he ain't going to be champ. The loss to Chambers proved he's not a real contender, but a victory over Haye on the road would set him up for other good paydays and even if he loses, it would probably be the best $$ fight available to him. It would make sense for Haye because Brock has good name recognition in the states and it would be a good yardstick and intro into the division.