CPU performance

Well I have done some wide searching and have found this CPU AMD Phenom X4 9850 2.5 GHz quad-core socket AM2+ CPU processor HD9850WCJ4BGH and wanted to get your advice on how you think this might perform. I cant get all the parts to build a new computer right now so I am just trying to upgrade the cpu. My gpu is a fairly nice one ATI Radeon 4650 HD. 4 GB of memory.

With these being my options and with a max of 95watts on the system board - System Board - M2N68-la narra 5

CPU combatibility - AMD Phenom II Quad-Core
AMD Phenom II Triple-Core
AMD Phenom Quad-Core (A) 9xxx series (AM2+)
AMD Phenom Triple-Core (T) 8xxx series (AM2+)
AMD Athlon X4
AMD Athlon X3
AMD Athlon X2 (B) (AM2+)

With most of these being discontinued it's seems nearly impossible that this upgrade is possible, so can I get your opinion on the cpu mentioned above.

Thanks.

Christyna