A decent air cooler is fine (I went for a triple copper pipe one). I don't trust water coolers because if they fail (ok, unlikely), they ruin everything. I have just had a comp made for me as follows:
Processor (CPU) Intel® Core™i7 Quad Core Processor i7-4770 (3.4GHz) 8MB Cache
Motherboard ASUS® Z87-A: ATX, USB3.0, SATA6GB/S, SLi, XFIRE
Memory (RAM) 8GB KINGSTON HYPER-X BEAST DUAL-DDR3 2133MHz X.M.P (1 x 8GB)
Graphics Card 2GB NVIDIA GEFORCE GTX 760 - 2 DVI, HDMI, DP - 3D Vision Ready
1st Hard Disk 120GB KINGSTON HYPERX 3K SSD, SATA 6 Gb/s (upto 555MB/sR | 510MB/sW)
I don't believe in overclocking.
Your gpu is comparable to mine.
http://gpuboss.com/gpus/Radeon-HD-7850-vs-GeForce-GTX-760I got mine to emulate as well. I want to play Last Story for Wii, for a start.