5/10 B&M - What about this line?

[FromTheSouth]

The villain is a thinking player, and sees me as a gambler. He had taken a previous pot from me, two hands ago, by bluffing a second barrel and with pure air. Then, this hand comes:

Effective Stacks 1000
Six Handed B&M.
Villan in MP raises to 80
Hero is in the BB and calls with A[img]/images/graemlins/spade.gif[/img] 4[img]/images/graemlins/spade.gif[/img]

The flop ($165) comes 8[img]/images/graemlins/heart.gif[/img]; K [img]/images/graemlins/spade.gif[/img]; 5[img]/images/graemlins/spade.gif[/img];
Hero checks,
Villain bets 150,
Hero calls.

Turn ($465): 4[img]/images/graemlins/diamond.gif[/img],
Hero checks
Villain bets 300
Hero thinks, and calls.

River ($1065): 8[img]/images/graemlins/club.gif[/img],
Hero goes allin (around $400).

Comments appreciated.