KK deep, bet sizing?

[dirtylobster]

How's the 4-bet size preflop? Should I have raised to 30ish with these stacks? How much would you make it with standard 100bb stacks? Also, the c-bets is a bit smallish and should probably have been bigger as it could be interpreted as weak and I'd have a hard time calling a shove as these guys were pretty weak/passive postflop. Should I have bet/folded like $40?

And I assume no one goes broke on this flop? His range IMO is like JJ+/AK. I've been pretty aggressive but I don't see him making any dumb moves w/ AK or TT.

SB: 14/5/1.3
BB: 47/5/1.6

Poker Stars - No Limit Hold'em Cash Game - $0.25/$0.50 Blinds - 6 Players - (LegoPoker Hand History Converter)

SB: $101.20
BB: $126.30
UTG: $17.80
MP: $51.80
CO: $23.15
Hero (BTN): $117.55

Preflop: Hero is dealt K[img]/images/graemlins/club.gif[/img] K[img]/images/graemlins/diamond.gif[/img] (6 Players)
3 folds, <font color="red">Hero raises to $1.75</font>, <font color="red">SB raises to $5.50</font>, BB calls $5.00, <font color="red">Hero raises to $24.00</font>, SB calls $18.50, BB folds

Flop: ($53.50) 6[img]/images/graemlins/diamond.gif[/img] J[img]/images/graemlins/diamond.gif[/img] 8[img]/images/graemlins/club.gif[/img] (2 Players)
SB checks, <font color="red">Hero bets $30.00</font>