Those guys use Ibanez and a PRS singlecut I think. In that case you can go have a look at the many good affordable singlecut guitars a lot of people have mentioned. Always start with a sensible budget and look for something you like in that price range. For $2k you can get pretty good set neck mahogany guitar. MIJ LP copies, Ibanez SZ Prestiges and Schecters to name a few. Many choices, especially since you probably haven't yet developed a sense of the kind of config you like and what doesn't float your boat. :wink:
Generally singlecut guitars cover a bigger frequency spectrum, especially the bass response. Doublecuts of similar wood construction would have a more focused less broad tonal range.
That's why I wanted to know what your idea of a nice "clean" tone is. Everything is "clean" if you don't run it into distortion. Difference lies in "warm and full" clean or "sparkly and spanky" clean.
Don't be too concerned about the specs. The best way of telling if a guitar's right for you is to pick it up and play. If it inspires you to play, it's a keeper.
Another piece of advice: spend up to the point where you can tell the difference in what you're paying extra for. It's like my audiophile friends who spend more money on their hifi because they can hear nuances in the recording that I can't.