I really like the look of the white NZXT Phantom 630 cases, but longevity is a big concern of mine, even the aesthetics. I'm worried that the plastic front cover of the case would turn yellow over time, while the steel side panels would stay true to original color, and that would look quite horrendous I think. My room environment is smoke free and only polluted by my breathing and the dirty laundry. So what do you think? Is it going to turn vanilla?