I've pretty much always ran NVIDIA cards, never had one fail and there always up to the job (provided you go mid range or higher), my 460 (the midrange of 400 series) has yet to find a game it cannot run on high to max at 1680*1050 (the only real game excluded would be final fantasy xiv but that requires SLI really to run at the best of the best, still looks amazing though).
I've had an ATI card before and while it was cheaper than a similar NVIDIA card i found it somewhat troublesome, towards the end of it's use it seemed to start messing up (artifacts appearing), and it had never been overclocked in it's life.
I also find NVIDIA cards better supported by games, never had an issue with the ATI card running a game but even so it's not very often you see the ATI logo pop up on the start up of a game where with NVIDIA it's fairly common (although it's not so common now a days, but that doesn't mean ATI has become more common either really, i've seen a few recently though).
To me it weighs up like this in my mind, if you want reliability and good power start at mid range cards go NVIDIA, if you want a cheaper but similar card go ATI but be warned things which are cheaper are usually made out of cheaper and poorly made materials/components (that being said though i had a cheap 750watt power supply which went bang after 4 years, and it was my fault anyway so really it's how lucky you are).
I've had an ATI card before and while it was cheaper than a similar NVIDIA card i found it somewhat troublesome, towards the end of it's use it seemed to start messing up (artifacts appearing), and it had never been overclocked in it's life.
I also find NVIDIA cards better supported by games, never had an issue with the ATI card running a game but even so it's not very often you see the ATI logo pop up on the start up of a game where with NVIDIA it's fairly common (although it's not so common now a days, but that doesn't mean ATI has become more common either really, i've seen a few recently though).
To me it weighs up like this in my mind, if you want reliability and good power start at mid range cards go NVIDIA, if you want a cheaper but similar card go ATI but be warned things which are cheaper are usually made out of cheaper and poorly made materials/components (that being said though i had a cheap 750watt power supply which went bang after 4 years, and it was my fault anyway so really it's how lucky you are).