Hello everyone, I'm trying to choose a graphic card for my N54L. Went thru the list on http://n40l.wikia.com/wiki/Graphics_Cards and now I'm trying to decide between these : ASUS R7240-2GD3-L ZOTAC GeForce GT640 2GB DDR3 LP SAPPHIRE HD 6450 2GB GIGABYTE N610D3-2GI I'm planning to use it under Linux with XBMC on it. Any advice is highly appreciated. Thank you !