Hello all. Been bored lately and looking for something to do to my computer. I got around $300 to spare and just curious what I could possibly blow it on. Currently running an i5 3570k at 4.5ghz with a Hyper 212 Evo cooler. My motherboard is a Gigabyte UD5H , 16gb Corsair Vengeance 1333 ram, Thermaltake TR2 Rx 850w psu, Evga Gtx670 Ftw video card, Intel 330 180gb ssd drive for my os which is Windows 8 Pro. What could I possibly do to this rig for around that budget? I was thinking about getting into water cooling just for the fun of it. What would you do?