I would consider Kershaw for Reyes, but I'd advise against it. Reyes is good, but I don't trust how long he would hold up. Throw in what your staff would look like after the trade and it's not all that desirable of a trade.
It's a risk/reward deal, and I'd sit on it. If you went for it, I wouldn't blame you. But, it's not the most solid deal for you.