Needlessly long, painfully standard? Commerce 5/10nl

[yanicehand]

Unsure of how I played this hand, was told I played it very standardly by another 2+2er, but am not positive what the best line is.

Commerce 5/10 nl. I have a tight/agg image and SB has been at the same table as I have for a couple of hours. We've played together once or twice, and he recognizes me as a regular. SB is a middle aged Frenchmen, tight aggressive player, who plays quite solidly. However, he seems very straightforward in his play and I have yet to see him get out of line in any way. The typical ABC player in this game: bets his good hands, folds his bad hands, calls or folds his marginal hands. My stack is ~$1500 and he covers.

I get ThTc in MP, everyone folds to me and I make it $40. Weak Passive guy calls in the cutoff, Frenchy in the SB calls.

Pot: $130
Flop: Kd 7d Ts

SB checks, I bet $70, CO folds, Frenchy picks up his cards and looks at them, and I almost start reaching for the chips there as this means hes going to fold 99.999% of the time. He thinks for almost an entire minute then chucks out $140. It really looks like hes making a move here, but I've never seen him do that - and I really doubt he'd try and do it to me of all people. I probably looked very surprised at his minraise, but I think for a while and call.

Pot: $410
Turn: 3h Ts Kd 7d

He checks... (??) and I bet $200.

What is his range here? Flop action? Turn action? Standard? The turn check really threw me off.