I was considering buying another Sapphire 6970 to run in Crossfire with my current one but after reading this(http://wccftech.com/amds-generation-28nm-hd7000-series-southern-islands-graphic-cards-specs-leaked) I'm debating holding off until the 7xxx series comes out. I don't keep up with this stuff so I'm not sure if this is accurate. If it is would it be worth it selling my current 6970 and buying a 7970? How much of a performance increase would I see? I heard the performance increase from the 5xxx series cards to the 6xxx series cards was twice the performance. What do you guys reccomend I do?