[howzit]

if you want to open push the turn on a non-spade, non-deuce, you'll have to make it at least 650 on the flop.

pot will be $1550 and he'll have around $1500 left. However, big pairs can fold a lot easier on the turn after this kind of action. Like flawless said, leading then 3-bet all-in will get more calls from overpairs on the flop.
your way makes pot of $1250 with him having ~$1700 left.

as is, if he has overpair w/a spade he has 16 wins, if he has a flush u have four wins. I still think my hand might be good but on a river spade, 9, 2, i'll still be able to get away. I'd make a thin call on the turn and push a blank river. (or you can do what the guy did against flexduck and call the turn and push on a high spade.)

this guy is commited if you push on the turn or river so I'd prefer to see a blank on the river before getting it in.

btw, is the other guy a limit player too? I don't like putting myself in a position where I have 700 left in a $3.3k pot w/one pair?