Upgrading my processor. Motherboard help?

Hello,
As part of an upgrade to Windows 7 I've decided to upgrade my 2.2 Ghz processor, but I am uncertain about which new motherboard I would need to buy for it. I'm looking into an AMD Phenom II at the moment, but by all means, suggest better models (looking for a medium- to high-end processor) .

Here is some relevant data from my dxdiag:

System Manufacturer: HP-Pavilion
System Model: RK572AA-ABA a1700n
BIOS: Phoenix - AwardBIOS v6.00PG
Processor: AMD Athlon(tm) 64 X2 Dual Core Processor 4200+ (2 CPUs), ~2.2GHz
Memory: 2046MB RAM
Card name: ATI Radeon HD 4800 Series
Chip type: ATI display adapter (0x9442)
DAC type: Internal DAC(400MHz)
Display Memory: 1274 MB
Dedicated Memory: 506 MB
Shared Memory: 767 MB

My power supply is a BFG GS-650.

Thanks in advance!
 
Back