NL$100| TPGK, how do i get value on river?

[Acevader]

Villain in this hand is 25/23/2.4 (130) and goes by the name Fisher Black - he seems very solid.

I think my preflop, flop and turn lines are fairly standard (I sometime 3-bet pre against a guy with a high steal (i.e. this guy)).

The question is what, if anything, can I do at the river to ensure max value when I'm ahead. Should I bet out here in the region of $20-30 with a 'fold to a raise' mentality?

This is the pearls of being OOP. If I check he checks all weaker kings behind me and value bets all hands that beat me. If anything this might be a good board to value bet out on as the 4 may prevent him from trying anything silly since he'll fear I have it. Thoughts?

Full Tilt Poker, $0.50/$1 NL Hold'em Cash Game, 5 Players
LegoPoker Hand History Converter

UTG: $202.40
CO: $100
BTN: $102.65
SB: $77.05
Hero (BB): $179.70

Pre-Flop: Q[img]/images/graemlins/heart.gif[/img] K[img]/images/graemlins/diamond.gif[/img] dealt to Hero (BB)
2 folds, <font color="red">BTN raises to $3.50</font>, SB calls $3, Hero calls $2.50

Flop: ($10.50) 6[img]/images/graemlins/spade.gif[/img] K[img]/images/graemlins/club.gif[/img] 4[img]/images/graemlins/club.gif[/img] (3 Players)
SB checks, Hero checks, <font color="red">BTN bets $8</font>, SB folds, Hero calls $8

Turn: ($26.50) 8[img]/images/graemlins/spade.gif[/img] (2 Players)
Hero checks, <font color="red">BTN bets $24</font>, Hero calls $24

River: ($74.50) 4[img]/images/graemlins/heart.gif[/img] (2 Players)