4/180 Early Edge Push

[All_In_Olly]

One area of my game I've been trying to improve is identifying edges early on in the 4/180s.
In the past I've definitely been too conservative, and doubling up early was a rarity for me, but now I'm stacking opponents when I'm ahead much more often.

I'm worried this edge pushing may lead me to being too loose aggressive.
With that in mind, is reraising All In ok here?
Is a flat call an option given remaining stack size?

CO is a maniac, his stats are 70/50/7 over 20 hands and his range much be huge.
BB is an unknown to me as he was moved here last hand and folded pre flop.
His call worried me somewhat, but then again he has a big stack, and I'm still only on level II where an average player is poor.

PokerStars No-Limit Hold'em Tourney, Big Blind is t30 (9 handed) internettexasholdem.com

MP1 (t3420)
MP2 (t2935)
MP3 (t1365)
CO (t490)
Button (t1270)
SB (t1555)
BB (t4395)
Hero (t1309)
UTG+1 (t2685)

Preflop: Hero is UTG with 8[img]/images/graemlins/heart.gif[/img], 8[img]/images/graemlins/spade.gif[/img].
Hero calls t30, UTG+1 calls t30, <font color="#666666">3 folds</font>, <font color="#CC3333">CO raises to t490</font>, <font color="#666666">2 folds</font>, BB calls t460, <font color="#CC3333">Hero ?