$200+ chips:
Only unit I see worth testing is the 3570k from Intel for experimenting. But I would still not upgrade my 1100t for it, nor would I swap out my 2500k for it.
The fx-8350 isn't bad but for $10 more you could upgrade to the i5-3570k, which I feel outclasses the fx-8350. Wait for the price to drop, or no go. If you did get it, it's not bad, since it could do possibly anything you want and more, but me, being a mutual user of both, I would rather get the 3570k. If the pile driver dips to $179, I'll buy. Anything more and its back to the fx-6300 @$139 or APUs.
The i7-3770k is simply over price for its performance boost. Rather save my money and get a better GPU or SSD.
$100-$200 chips:
This range actually has a lot more options.
i3-3220 is a duo core and locked processor that originally competed with fx-4170.
fx-4170 was favorable till fx-4300 came out. But now fx-6300 is only $10 more than fx-4300..
If you don't know how strong the fx-6300 is, look at the chart and remember its a $139 cpu.
Also google "4170 vs 3220" and you'll see that the two are rivals.
i5-3450 just simply costs too much for its performance difference; $199 is simply too much for its performance, compared to its competitors. $30 more and you get the i5-3570k unlock-able with already super performance.
$60 behind is the fx-6300, but sadly the gap is too large for teh performance difference.
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I would honestly pick the fx-6300. It just simply out-values anything around its market.
Bad Year for upgrade. Good year for new builders. Strong and more affordable; just not enough improvements for people already using workable units.