Bradley wants Khan:

"The toughest fight would be Devon [Alexander] no doubt. The second toughest fight would be Marcos Maidana, and the third would be Khan. That's how I rank it. But the most money is Khan. I would take Khan in a heartbeat. Alexander is a lefty, he's quick and has a great jab, [and] he's hungry. The thing with Khan is, he's still learning. He still has a lot to learn. I saw a lot of things he did wrong against Malignaggi."
As does Andre Berto's at Welterweight. From his promotor Lou Dibella:

"I'm not saying that he's definitely going to do it, but in this business it's good to have options and one of his options is to fight below 147. Berto is not a big welterweight. Why couldn't Amir Khan or Tim Bradley fight Berto for his welterweight title at 143 or 144? He wants the big fights now. There is a lot of talent and a lot of potential good fights a weight class below"
Can't see Khan fighting Berto at welterweight just yet.