XBMCBuntu Suggested Graphic Card

Hi All,

Hoping someone can help me out I currently have the following setup:

AMD A8-3870 3.0GHZ X4 Core Fusion APU/HD6550D Socket FM1
Asus F1A75-M PRO FM1 AMD A75 4x DDR3 HDMI DVI D-Sub CrossFireX SATA3
Antec 520W ATX NEO 520C ECO PSU
Corsair CMX4GX3M2A1600C9 4GB (2x XMS3 2GB) PC-12800
SilverStone LC20B Black ATX Case

However I am having play back issues where a transparent horizontal line is flickering through the centre of the screen. It happens more on 1080p playback however it is still noticeable even on SD content.

I am thinking the drivers aren't quite working out on the on board HD 6550D.

I have played around with the playback settings in XBMC, turning on hardware acceleration and changing the refresh rate to match my TV 50hz (Australia). However nothing seems to fix it.

I am now at my wits end and am ready to try just about anything to fix this including buying a new graphics card.

I am hoping that someone can either suggest a fix for me or suggest a reliable graphics card that I can install without having to muck around with new drivers.

Thanks in advance for your help guys and gals!

Chris