Crucial M4 CT128M4SSD2 2.5" 128GB SATA III MLC Internal Solid State Drive (SSD)
Gaming mice and keyboards are nice, but the performance boost you'll see from an SSD is going to enhance your gaming experience a lot more than snazzy input devices. If you don't have enough for that drive right now, keep saving. you'll thank me.
Also, you are far less likely to spill coffee on an SSD.
I still find SSD's useless. Though you have given me an option for when they get 3 times cheaper. (Ex: $200 -> $50)