5NL AKo in the CO

MP: $5 (100 bb)
Hero (CO): $14 (280 bb)
BTN: $2.65 (53 bb)
SB: $5 (100 bb)
BB: $3.44 (68.8 bb)
UTG: $12.50 (250 bb)

Preflop: Hero is CO with K A
MP posts BB OOP, UTG folds, MP checks, Hero raises to $0.17, BTN raises to $0.40, SB calls $0.38, BB folds, MP calls $0.35, Hero ??

MP is 63/0, 10 hands
BU is 35/15 30 hands, this is his first 3bet
SB is 16/13, 7.4% 3b, 78 hands

Confused about what to do here. Surely calling can't be all that great due to the fact that I'll be OOP to the raiser in a 4 way pot with a hand that isn't going to play all that well 4 handed. Can I raise for value here? Assuming that the BU is 3betting a reasonable range like JJ+, AQs+, AK I can't really do that either but like I said I don't want to take this hand against 4 players post.

Thoughts?

SB calling is scary for sure, but there is SO much dead money that I think you just have to shove here.

the BU seems like a fish given stack size, 3b size, etc. so i wouldn't go nuts trying to nail down his 3b range. some dudes like that only 3b QQ+, or i could be something crazy.

but like griff said, the sb's flat is the scary part. i know this about AK, its not the easiest hand to play. especially vs. a bunch of fish who will suck out time after time after time against your AK, but you'll get more comfy playing it

Well first of all, calling would be an extremely high EV option. AK plays quite well in 4 way with the stacks. If you flop a pair you will be very strong with only 4.5 behind in a 1.60 pot.

Shoving is surely quite plus ev as well though, so I think its pretty tough choice between very profitable alternatives. I would shove.