I use my main rig for gaming at 1080p, streaming and soon to be video making and editing. Haven't quite got all that worked out yet but in the process of doing so.
I had originally started off with a prebuilt computer done by Cybertron, though became ashamed of spending the money on something that did not quite live up to the name of "gaming PC". At the Time, it was an AMD FX 4130 CPU, Gigabyte 78lmt-usb3 mother board, 8gb of generic brand RAM, GT 610 GPU, 1TB HDD Toshiba and a 500w PSU, all tucked in an Apevia X-Sniper 2 RD. The GPU barely ran games well enough, even WoW at med settings struggled, so I knew it was time for a change.
Over the course of what would be a year, I spent time, effort and money finding parts to add to my build or replace what I had. These parts, both new and used, came with some very impressive buys and deals I didn't expect until I was left with a completely new computer altogether.
Starting off with probably my most frugal purchase would be the Intel i7 4770k, Corsair Vengeance 16Gb 1833mhz RAM and MSi Z97 motherboard. I actually bought a computer, used obviously, from a guy in the city I live. I was buying his GTX 660 at the time for another build I had planned, and was soon offered what was his entire rig. It had included the above up top, as well as the stock cooler, Rosewill Thor V2, 1250w 80 Plus Cooler Master PSU and his Windows 8.1 Key and disc for $300 CAD ((excluding GPU, I paid $50 for that)). This worked out to about $34 per component, which was a net gain.
Next was my much earlier buy of the Corsair CX750M PSU. I had gotten incredibly lucky on this one, managing to find it for just over $70 CAD during an Amazon Inventory sweep. It has since served me quite well. At that time I had also bought an ASUS GTX 750ti, which was a far-cry from what I had before. I was able to finally play games with respectable frame rates and much higher settings, which served me well until I got my first GTX 960 4gb before last Christmas.
I bought the first GTX 960 new, but got the other one used a few months ago. It also came bundled with The Division, which made the buy all the more worth it as it is still a newish game. Under normal circumstances, I would have bought a much better single card as SLI isn't supported with many titles, but I have quite enjoyed the performance boost I have gained out of it and it actually looks quite nice as they are both the exact same model. Both cards even OC to 1455mhz, though I am sad to say my first GTX 960 actually hit 1505mhz stable, whereas the other card wasn't able to push that far and caused me to bring my OC back down for stability.
For what it is worth, this build would have normally cost $2,000 CAD and up when all is said and done, and more so if all the parts were brand new and out of the box. However, with a bit of frugality and knowing the best deals I came across, I have a rig that has served me quite well. I also know this is complete and utter overkill for gaming at 1080p and I don't need SLI either. It was a personal choice I made and I do not regret making it as I do love how it looks.
And yes, an SSD is going in soon enough, it is the last upgrade that makes sense now.