Well this thread maybe useful for people who are planning to purchase a system for linux use only and which GFX card to choose mainly ATI, NVIDIA or Intel.
I would categorize the the GFX based on these parameters:
Features Supported in Linux compared to Windoze counterpart
Well I am yet googling as much info as I can but would love in if others can chip in with more details. I have a lappy based on NVIDIA Chipset so I have better experience with nvidia.
Proprietary Binary Drivers, More of take or leave solution but still the decent one out there when it comes to performance and supported hardware. Small nags such as poor 2D performance are there but most of them can live with it.
nouveau OSS Drivers, still long way to go before it can replace the nvidia drivers. This will be WIP for long time i guess. wont be discussing about this further as there still lot to be done.