Other:
You may wish to consider the GTX750Ti instead. It is almost exactly the same performance as the HD7850, runs much cooler and quieter. It's about a 6% difference for stock models but the Asus 750Ti can overclock higher than the HD7850 so it's as good or better (let's just say equal).
Benchmark:
http://www.techpowerup.com/reviews/ASUS/GTX_750_Ti_OC/2...
The HD7850 is also more expensive if comparing similar quality so I can't think of a good reason to get one unless you get a great deal.
The ASUS version is $130 after $20 MIR and is an incredible value:
http://pcpartpicker.com/part/asus-video-card-gtx750tioc...
*The GTX750Ti is an NVidia card so you have a few features AMD does not have such as SHADOWPLAY which can record/stream with minimal impact due to the NVENC hardware encoder.