A model called "SX:9" was in Atomic's lineup for many years, and went through several re-designs. The NEOX binding and the red adjustment button mean you probably have one of the very last ones - for which a 2007 or 2008 date would be approximately correct.
For the rest of the post I will assume you have the one of the last versions - with squared off Beta lobes and titanium pulsers, and slightly less snakelike texture to the topsheet, with the 3-plastic integrated plates that replaced the 2-plastic black and silver ones. That generation of SX:9 was the one where Atomic finally got everything pretty much spot on for a tough guy with carving skills who wants to ski all over the mountain. The tips wre better connected to the snow than ever, the flex was more progressive than ever, the ski would land hops and jumps without fuss, the ski would punch through crud and still feel ...relatively...lightweight.
Unfortunately, Atomic got this ski completely sorted about 3 seasons too late for the US market; companies like Nordica and Blizzard were doing tough all-mountain carvers in mid-70 and 80+ mm waists and no one looked at 69mm waist sort-of-GS-but-not-really skis anymore.
The good news is that the bindings on those are possibly in better shape than the integrated binding systems the competition was using - most of those loosened up a lot and some are complete junk now. The other good news is that the bases and edges were designed for toughness, so they're probably in quite good shape too.
The bad news is that you still need good carving skills to make them feel good, especially in the longer lengths. They don't really do slarved turns and they kinda feel dead at low speeds and they don't really do soft-edge feathering. Not really a learning ski, and a very meh ski if one wants lazy cruising.
Does that answer your questions? What length are your pair and how much do you weigh?