Foxwoods 10-25, straight draw on a 2flush board

[B-Man]

Foxwoods 10-25. Opponent came to the game a half hour ago, I've never played with him before but by reputation have heard he is a strong player. He bought in for over $10,000 and has the table covered. He's seemed to be loose aggressive so far, especially in position (he raised with 52s one hand).

I've been playing fairly tight in the brief time he's been at the table.

I start the hand with $3,300.

Two limpers, I limp in the cutoff+1 with 89o (no hearts), opponent makes it 125 to go from the cutoff, the limpers call, I call.

$575 in pot

7c Th Qh

The limpers check, I check.

1. Opponent bets $400. Limpers fold. I think this guy could have any two cards. How should I play this?

2. Assume I think for over a minute, then check-raise to $1,200, then opponent insta-pushes. I'm getting 5:2 pot odds. Given how I've seen him play, and that my taking so long to check-raise could have been perceived as weakness, I think my opponent's range here is still pretty wide. Should I call?