Decent powerful workstation + gaming rig.
When I've bought the first of current R9 270X, the MSI one, I thought: 'Hey, why I need something more for 1080p gaming and my work (Adobe software like Photoshop, Illustrator and InDesign)? It's okay, don't even think about it' (also was limited in budget).
Then, half a year after, I got some free funds that I wanted to spend on my PC. There were different ways like "sell this R9, add more funds and buy the new awesome GTX970", "or even GTX980", but.. 'This is too mainstream for me', thought I and bought another R9 270X (the Sapphire one) from eBay. Didn't find any MSI with suitable price, so I decided to go for dual-GPU setup with two different manufactures. The funny thing is, I have paid for Sapphire Dual-X R9 270X 2GB OC, instead I've got Sapphire Vapor-X R9 270X 2GB OC. Well, I was happy even more than I expected, because Vapor-X cooling system is cool (and runs even cooler). I'm really happy of this decision, because with current XFire I've got the power of GTX780 (or even Ti) for only €260.50 (around $310). By the way, yes, XFire works on super-quiet 550W PSU (default 80PLUS standart).
UPD: well, I bought EVGA GTX 980 Ti SC+ on 17 Nov and I can say that I am truly happy with the graphics and 60+ fps now. It looks amazing.
What about RAM.. I bought Kingston HyperX Genesis 2x4GB, and after some time passed I decided to get another 8GB, because Adobe soft likes RAM.. Lots of RAM. A-and I found that HyperX Genesis series is no longer being manufactured. Luckily, I found the last kit of HyperX Predator with same parameters (1.65V, 9-11-9-27 timings and 1866 MHz) and bought it. That's it, I guess. The rest of the parts are quite usual.