I have the asus r9 280x top. I purchased it with a new build about a month ago and would highly recommend it! Plays EVERY game at ultra settings with no problems..(Crysis 3, Metro last light, BF4 etc, etc) and don't hear it even after hours of gaming! I don't know what the prices are on these at the moment but I got it for around £260 when they were first released and really don't see a need to spend more when this does such a great job. I purchased this card to go with a i5 4670k.
Hope this helps...