AK preflop vs. midstacks (NL50)

[CalledDownLight]

I have no reads here and was a little uncertain of the best way to proceed. Table was breaking up a little bit and some people adjust to this quickly (like myself) and others don't change a thing. Thats also something to consider here imo.

PokerStars No-Limit Hold'em, $0.50 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

saw flop|<font color="#C00000">saw showdown</font>

Button ($50.60)
<font color="#C00000">Hero ($53)</font>
BB ($63.35)
UTG ($46.85)
MP ($21)
<font color="#C00000">CO ($22.30)</font>

Preflop: Hero is SB with A[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/heart.gif[/img].
<font color="#666666">1 fold</font>, <font color="#CC3333">MP raises to $2</font>, <font color="#CC3333">CO raises to $3.5</font>, <font color="#666666">1 fold</font>, Hero wonders if its best to fold or 4bet and call a shove