yeah shure

quadro 900 is fine
they are all fine

but what i want to say is that

FX is a new era
HARDWARE RENDERING is ONLY possible with FX
there a a couple of things the new FX series can do and the old can´t

fx500 is fine because it has the lowes clock of all fx chips
so you can overclock it nice and easy

--> fx is ALWAYS WAY better than the old ones