1-2 NL party, big push of flush draw vs 2 opponents

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Party Poker No-Limit Hold'em, $ BB (6 max, 6 handed) converter

MP ($75)
CO ($203.55)
Button ($121)
SB ($108.55)
BB ($200)
Hero ($200)

Preflop: Hero is UTG with 8[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/heart.gif[/img]. SB posts a blind of $1.
Hero calls $2, <font color="#666666">1 fold</font>, <font color="#CC3333">CO raises to $4</font>, Button calls $4, <font color="#666666">2 folds</font>, Hero calls $2.

Flop: ($15) J[img]/images/graemlins/heart.gif[/img], 9[img]/images/graemlins/spade.gif[/img], 6[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, <font color="#CC3333">CO bets $15</font>, Button calls $15, Hero calls $196 (All-In)

Both opponents are loose preflop, &gt;50% VPIP, don't know much else.

I did some quick calculations (post hand) where I assumed a caller would have a set 50% time, overpair to J or AJ 25% and 2 pair 25%. So I would always be losing, and the ace out would be no good. This gives them roughly an avg of 6 outs to beat my flush if it comes, so about 24% of the 33% times I make the flush I still lose.

Given these assumptions I need them both to fold ~66% to break even. More than this and its +EV.

Reasonable move or not?

Edit: fixed some math.