As I've said in other threads, despite all the times Judah has screwed up, he is still a very talented fighter and I would look forward to seeing him in the ring with Cotto, especially in NYC because the atmosphere would be great.
Cotto's body attack vs. Judah's speed and movement would be an interesting clash of styles. I actually think Judah's style could give Cotto more problems than Margarito's could. And that's not a knock against Margarito, it's just that styles make fights, and I don't think Margarito's style would work against Cotto.