Video card question

I'm offered a computer for a good price and I'm thinking of buying it, but I had a question about the video card.
So far I've only worked with Nvidia cards and I see on the forums always talk about Nvidia, but I was wondering if a Radeon is any good.
The computer I'm looking at has a Radeon HD7850 with 2GB DDR5, does anyone have experience with this card and how does it perform for flightsim?
So far I've only worked with Nvidia cards and I see on the forums always talk about Nvidia, but I was wondering if a Radeon is any good.
The computer I'm looking at has a Radeon HD7850 with 2GB DDR5, does anyone have experience with this card and how does it perform for flightsim?