5, 10 No Limit at B&M

[Tom22]

I'm looking for some advice after the flop.

BB ($1500)
UTG 2 ($835)
MP 2 Hero ($2800)
CO ($4000)

UTG 2 calls, I call with 5 [img]/images/graemlins/spade.gif[/img] 8 [img]/images/graemlins/spade.gif[/img], CO raises to $50. BB calls, UTG2 calls, I call.

Flop: 2 [img]/images/graemlins/diamond.gif[/img] 4 [img]/images/graemlins/spade.gif[/img] 6 [img]/images/graemlins/spade.gif[/img] ($205)

BB checks, UTG2 checks, I check (with the intentions of putting a big check raise, knowing that the CO will bet), CO bets $100, BB raises to $300, UTG 2 goes all in for $785.

What is hero next move?

My thought process at this point. CO could have anything but probably made a continuation bet. BB could have a flush draw, overpair, 2 pairs. I put UTG2 on two pair or a set. I don't think anyone would play a 3 5 preflop for a straight.

What is the correct move at this point? I'll post what I did after I get some responses.