Honestly there won't be much of a difference between your current 9450 to a 9650 to merit the upgrade. At least in my opinion, I'm sure others would back me up on this. I doubt you're pushing your current chip to its max. Also you probably wouldn't notice any speed bump if you're at similar clocks. I didn't notice any difference between my x3 720 @ 3.6 and my i7 920 @ 3.8. It feels very similar in desktop.
Not trying to burst your bubble but it really isn't worth the money.
Perhaps try for a p55 if you were looking for newer hardware. Even still it won't be that big of an upgrade.