I would make him put all his chips in the middle if he wants to see a flop. Depending on how he's been playing, if he's a scared nit he may even fold hands like A3-A6, especially if he's just trying to hang on and ladder up. You have him covered by quite a bit, so it's not like you will be completely cripped if you double him up.
I don't like the limp from the SB or anywhere OOP, to me it implies that you have a speculative hand just like you one you had here and if I have any A or K, two Broadways, or any pair in the BB I'm going to shove. If I think I have a tight image, I may shove with much less, especially if I've seen you limp-folding in the past.
If you raise, you have two ways to win: they fold, or you win at the showdown. If you limp, the only way you can win is at the showdown.