3/6 AK situation/line check 100bb+

[pokerprochris]

Villian in hand is multitabling reg who I think is decent - his playing 17.5/15.4 over a 600 hand sample - haven't seen him get out of line yet but I am sure he is capable of making some moves

I feel he views me as playing abit on the tight side - and unwilling to put my money in without the goods

What would be a better line for playing this hand considering the situation I've found myself in -

Poker Stars - No Limit Hold'em Cash Game - $3/$6 Blinds - 6 Players - (LegoPoker Hand History Converter)

SB: $1,418.00
Hero (BB): $729.40
UTG: $296.70
MP: $1,315.10
CO: $799.05
BTN: $824.75

Preflop: Hero is dealt K[img]/images/graemlins/diamond.gif[/img] A[img]/images/graemlins/club.gif[/img] (6 Players)
3 folds, <font color="red">BTN raises to $18.00</font>, SB calls $15.00, <font color="red">Hero raises to $72.00</font>, BTN calls $54.00, SB folds

Flop: ($162) 9[img]/images/graemlins/diamond.gif[/img] K[img]/images/graemlins/club.gif[/img] 7[img]/images/graemlins/club.gif[/img] (2 Players)
<font color="red">Hero bets $105.00</font>, BTN calls $105.00

Turn: ($372) Q[img]/images/graemlins/diamond.gif[/img] (2 Players)

Pot Size: $372.00

Comments and advice greatly appreciated [img]/images/graemlins/smile.gif[/img]