As for a blue or brown switch keyboard, I'm currently using a Ducky Shine II with blue switches. The only problem is that this keyboard is [i]very[/i] expensive. You can get cheaper Cherry MX blue keyboards though. As for the PSU, you will need to get a PSU with more wattage. I'd say AT LEAST 600 watts. I'm currently using a SeaSonic 750 watt PSU that is 80 Plus Gold certified, so I'm good to go to dual cards (which I do plan on doing eventually). Anyways, just buy a power supply that is at least 600 watts, at least 80 Plus Certified, and is from a trusted and well known company. And the 2500k will NOT bottleneck the 780 and vice versa. All is good.