And with support you mean drivers and so on, or user suppor via forums or something like that??
The controller of the CPU (AMD) and GPU (ATI) has many patches, and continuous improvement. ATI drivers have fewer problems and better compativility (I have a new ECS GTS240 for her between in the Phoronix forum :D) because it gives me a low performance and even do not know why :S.
But I do not give up on my adventure with Linux is a great OS.
Sorry for my English is not good: P