GPU Question

[Vorpal_Spork]

It will probably be enough. The 970 is one of the cards with the best cost/performance and I recommend you to get it, even if it doesn't max out at 1440p the next in line is 980 which is close to double the price and 2 970s are therefore a better choice. So start with 1 970 and if that is not enough get another if your budget allows it.

But considering that your GPU is a 480 the CPU might also be in need of an upgrade, but test out with getting one 970 first and depending on where the FPS is lying around you might wanna consider upgrading the CPU.

SLI/Crossfire are only really worth it for insane resolution multiple monitor setups. Otherwise a single, more powerful GPU is better. On a single monitor you're setting yourself up to have to deal with sketchy or no SLI/Crossfire support in some games, microstutter and diminishing returns for no real reason.