I originally was not going to bother with a CPU upgrade this generation but with Intel's plan on soldering chips directly to MOBOs, I will probably have to make a CPU upgrade on my current system. That upgrade will allow me to take advantage of PCI 3.0. A board can have PCI 3.0 but it still uses 2.0 if you have a 32nm CPU.
My mouse and keyboard are outdated but since I don't use my keyboard for gaming there is no reason to upgrade. I really only bought my G15 for the LCD screen to use to monitor stuff in game. Every time I start shopping around for a new mouse though I can't justify the cost. My mouse works just fine. I don't do anything that requires super precious tracking like sniping or anything like that.
Also I will never give up Razer Nostromo. I've been using a Nostromo for like 6 years now, since it was made by Belkin. It's a thousand times better then using a keyboard.
But what's wrong with my case? I'll take big quit fans over little noisy ones any day. People who want to cram everything into tiny little cases are the same people who complain about temps and/or fan noise. For an air cooled rig the HAF X is tough to beat.