AKo HU UI

[Ulkis]

Moved one level down, no reads on anyone, more coldcalling PF than .5/1, more checking postflop, villain unknown. New level, and I've determined to start by not losing monies!
I have a feeling this post is deja vu for many, but am trying to post a hand from every couple of sessions or so that made me uncertain what the best line is.

PokerStars 0.25/0.50 Hold'em (10 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Preflop: Hero is UTG+1 with A[img]/images/graemlins/spade.gif[/img], K[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises</font>, <font color="#666666">6 folds</font>, SB calls, <font color="#666666">1 fold</font>.

Flop: (5 SB) 5[img]/images/graemlins/heart.gif[/img], 3[img]/images/graemlins/diamond.gif[/img], 4[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
SB checks, <font color="#CC3333">Hero bets</font>, SB calls.

Turn: (3.50 BB) 7[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
SB checks, Hero checks.

River: (3.50 BB) Q[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">SB bets</font>, Hero ?