Best CPU for Xvid (FFDSHOW) playback

Hi All,
I'm in the process of building a HTPC playback (only) machine to primarily play SD DivX/XviD files through ffdshow on a standard CRT monitor, does anyone have any good CPU suggestions?

Or which factors I should look for when selecting a CPU & Motherboard that work well with DivX playback? Also I would like to use some of the features of ffdshow without getting choppy video (like my current P4 does). Budget is an issue so I'd like to go inexpensively as possible

Again this is just for SD playback (I encode on a different machine).

Thanks!

What do you think about those systems for HTPC? I'm planning to add Radeon HD 4550 to it.
Is it worth getting system 2 for extra $100

System 1
Brand HP
Series Pavilion
Model A6600F(FK792AA)
Recommended Usage Home / Home Office
Processor Intel Pentium dual-core E2200(2.2GHz)
Processor Main Features 64 bit Dual Core Processor
Cache Per Processor 1MB L2 Cache
Memory 3GB DDR2 800
Hard Drive 320GB SATA 7200RPM
Optical Drive 1 SuperMulti DVD Burner with LightScribe Technology
Graphics NVIDIA GeForce 7100 Graphics with TurboCache with 128MB dedicated graphics memory. Up to 1343MB Total Available Graphics Memory as allocated by Windows Vista
Audio High Definition Audio
Ethernet Integrated 10/100 Base-T networking interface
Keyboard HP multimedia keyboard
Mouse HP optical mouse
Operating System Windows Vista Home Premium 64-bit

Price $239(system above only)

System
Processor
Intel® Pentium® Dual-Core Desktop Processor E5200
• 2.50 GHz, 2 MB L2 Cache, 800 MHz Front Side Bus
Chipset
Intel® G33 Express Chipset
Standard memory
4 GB (4 x 1024 MB)
Memory type
PC2-6400 DDR2 SDRAM
Internal drives
Internal hard disk drive
500 GB
Hard disk controller
Serial ATA
Hard disk drive speed
(7200 rpm)
Optical drive type
SuperMulti DVD Burner with LightScribe Technology

Price $349