Rather see him at middlweight as well. I personally do not think he could ever really get to contender at light heavyweight. But i do think he has a decent chance at middleweight.
Anyways i would love to see him fight Shogun. I personally think that is the fight that would make the most sense at this time.
Machida and Gus are both a spurt to high on the ladder at the moment.
I would also like to see him fight Hendo. I think it would be a good test of his improved wrestling ability (take-down defense). But he would first have to spend some time training in the States (with some good wrestlers). Him fighting sarafine would be interesting as well.
So first and stand up war and then a fight against a good wrestler in the division would be ideal for personally.