For the most part that first page shows AMD-favoring games, and the second shows nvidia-favoring ones. But while the gaps are relatively small all around, you can see that the 7970 and 7950 are relatively better at higher resolutions--they have larger advantages or narrower disadvantages than at lower resolutions.
The 670 isn't a bad choice either--people make too much of the 3GB of VRAM for current gaming even at high resolutions, and it's more efficient in all games and still just better in some games. But I'd still go for the 7970 for a few reasons: it's more overclockable; it's best at those higher resolutions; and the RAM and RAM bandwidth will be an issue faster (that is, sooner--for games coming out soon) at higher resolutions.
I have to admit I'm leaning towards the 7970 lighting, I'm just concerned I may run into issues regarding the adapter, will it cut out, will I lose any quality, noob questions but I'd rather be safe than sorry!
Beware of the noise levels on the MSI 7970 Lightning. It's more than twice as loud as the MSI GTX 680 Lightning (+10 Dba doubles the perceived noise level). That MSI GTX 670 Twin Frozr III will be MUCH quieter and perform for all intents and purposes as fast as the 7970. Plus you'll get Physx, Adpative VSync, FXAA, etc.