@mang : I assume your gonna buy the new phenom after selling ur existing x2 240? Something like 5k-2k=3k?
Option 1:
I suggest you look for used X4 955/965...Most of them are selling from anywhere from 3.5k to 4.5k based on age/model.I assume your board has 95W cpu(for quad, X2 need 80W) support as most am3/am3+ ones do.
Option 2:
In-case you want new then i see no other choice than the 560 given your constraint of budget+sticking to same mobo...i'm not aware if the current batches unlock into a stable tri core/quad core, that would be based on your luck and mobo(if it supports core unlocker_check your bios version)
The X450 cards you've chosen stay in the lowest end of the ladder graphic ladder as suggested by d6bmg above.I suggest , you invest in a used Gt240/5670, once again coming anywhere from 1.5k-2.5k based on age/model
And lastly, do save up to invest in a good branded psu. All that hardware will be put to risk with a generic cheap A$$ psu