Everything is going good, until...

arf has been getting some good suckouts on me and this was one of them. I started reading him as tight-passive when he is on draws and tight-aggressive when he is on a hand that he feels he has the best of.

** Moscow [Hold 'em] (1.00|2.00 Fixed Limit - Cash Game)

** Dealing card to ItalianFX: J[img]/images/graemlins/heart.gif[/img], 10[img]/images/graemlins/club.gif[/img]
arff73 called - $1.00
Hork folded
Sand101 folded
ItalianFX called - $1.00
BigAl318 checked

** Dealing the flop: 9[img]/images/graemlins/spade.gif[/img], 2[img]/images/graemlins/heart.gif[/img], 10[img]/images/graemlins/diamond.gif[/img]
ItalianFX bet - $1.00
BigAl318 called - $1.00
arff73 called - $1.00

** Dealing the turn: 3[img]/images/graemlins/diamond.gif[/img]
ItalianFX bet - $2.00
BigAl318 folded
arff73 raised - $4.00
ItalianFX raised - $6.00
arff73 raised - $8.00

What do you think arff73 has, or what do you put him on? What do you do next?

I'll post the results after a few responses come through.