I am looking to get a CybertronPC QS-A6 ( http://www.bestbuy.com/site/cybertronpc-electrum-desktop-amd-a6-series-16gb-memory-1tb-hard-drive-red/5392302.p?id=bb5392302&skuId=5392302) and I was wondering if anyone new if i could take out the graphics card in it and replace it with A Sapphire Radeon R7 250. Or if anyone can point in the direction of a computer similar to the one listed. I really don't want to spend to much money? Please and thank you.