Live Donkament Hand From WSOP ME

[Gramps]

300/600, 75 ante, 9 hours into Day 1. I have like 30k to start the hand. Two limps to me in the CO, I have 5 [img]/images/graemlins/club.gif[/img] 5 [img]/images/graemlins/heart.gif[/img] and no there's a VG chance it won't be raised to my left the way things have gone and limp (I am somewhat concerned about one of the two EP limpers, I would raise that hand a fair amount), button limps, BB checks, 5 to the flop, 3750 in there.

8 [img]/images/graemlins/diamond.gif[/img] 6 [img]/images/graemlins/heart.gif[/img] 5 [img]/images/graemlins/diamond.gif[/img]

Checked to me, I bet 2300 acting, button raises to 7300 without too much thought, folded back to me, he has me slightly covered.

Unfortunately, button (~50, big tall/fat dude) has only been at my table 1 1/2 hours. I don't have as much info as I'd like, but this is what I've seen so far:

-Showed up at the table with about 45k in chips.
-Folded to him on button, he open limped 97o and checked behind SB&BB on missed dry flop.
-Open limped EP 3 times and raised all 3, folded twice, called once and folded postflop.
-Open limped EP a 4th time, SS pushed for 13 BB, called in 2 seconds with AKo.
-One limper, I complete SB, he raises small to 3XBB with AKo, 6-5-4 two suit flop he bets 1/3 pot and called in 2 spots, then A-off Turn, bets very small, gets raised (I fold), calls, River Q, check-calls and loses to some lady's AQ (she's got a big chipstack and the whole table has been talking about how hot she's running) and is steaming and grumbling about that hand for 10 minutes, and grumbles whenever said lady wins another pot.
-BB only (SB just eliminated), CO-1 raises to 2k (300/600, 75 ante), coldcalls A6s on button, flops nut flush on 7-5-4 board, checked to him (3-way, BB is in hand too), bets like 2/3 pot or so and other players fold, flashes hand and is grumbling about how when he gets a hand no one comes along.

Since he's sat down at the table, I've raised maybe 5 hands and won 1 (I've C-Bet 3 times without winning the hand, twice folding to a later bet). I've 3-bet a raise/coldcall and won the pot uncontested. My table is decent, although my relative position at the table isn't great b/c the two tightest guys are to my immediate right, and two guys on their right raise a fair amount. The two people to the left of this old guy will defends their blinds and playback in spots.

I'm wearing a Luckbox shirt.

Knowing all of the above...what's your action and why?

<font color="blue"> <u>Cliff notes</u> </font> : I think this guy may be the type where postflop raise = big hand, but he may be steaming a bit, I've only played with him for 90 minutes, and since he's been at my table I've folded to any playbacks. I'm wearing a Luckbox shirt.