Bubble Play with KK

All in here is the only option. I can't imagine even the worst player slow playing aces given his stack and the fact that he's BB next hand, so you know you have him beat.

If UTG calls your all in and TAG folds, even if you're drawn out on you still have enough chips to possibly make something happen.

If UTG folds and TAG calls, then at the very least you know you put your money in with the best hand (AA is POSSIBLE, of course, but certainly not probable enough to get away from the hand for that reason).

If you fear a drawing hand that can really improve over you (say AQ suited), and you'd rather just make the money than have a chance to double up and win the thing, then fold.

I push all-in here, though.