Replacement for Phenom 2.2 x4 9550 for HP.

[OldLinuxGuy]

Hi:

It has been awhile since I have replaced a CPU. Here is my question. I have been told I can replace my dead Phenom x4 9550 (2.2GHz) with one of the Phenom II cpus. The HP site says that this case is maxed at 2.2 but I suspect that was the max at the time. Now, I do know I need a max of 95watts for the CPU. I want the fastest cpu that will work reliably in the machine, and whether I can use my stock heat sink. Part number would be helpful. I believe the socket is AM2+ from HP specs sheet. What are my options?