You should probably wait for a while then, seeing as you don't even know the minimum specs for each game, and the 6000 series will probably be a lot cheaper by the time the 7000 series gets rolled out, going for something in the 6000 series would probably be your best bet at that point.
PC
OS: Windows® XP/Windows Vista®/Windows® 7 (Latest Service Packs) with DirectX® 9.0c
Processor: Intel Pentium® D 2.8 GHz or AMD AthlonTM 64 X2 4400+
Video: NVIDIA® GeForce® 7800 GT or ATI Radeon™ X1950 Pro or better
RECOMMENDED
PC
OS: Windows Vista®/Windows® 7 (Latest Service Packs) | Processor: Intel® Core 2 Duo 2.4 GHz or AMD AthlonTM 64 X2 5600+ 2.8 GHz | Memory: 2 GB RAM | Video: NVIDIA® GeForce® 260 or ATI Radeon™ HD 4870 or better
That's what I thought. Seems like every forum says it looks great. So looks like that's fixed! Hopefully it will go down in price by the time I buy it :O