I like both suggestions. Sturm would be a very good opponent and though I despise Chavez Jr. I can see how it would make some sense, certainly a lot more sense than Manfredo. Undefeated and selling on the back of a family brand makes a lot more sense than Manfredo who has never been particularly good. Sturm is a higher pedigree, but as has been pointed out, he doesn't travel. Unless it's a 2am job, it probably isn't going to happen. Plus Martinez will argue that he shouldn't be needing to make sacrifices now that he is top of the heap and I kind of agree with that too.