I can't really put together a build for you properly as I'm on holidays at the moment and my laptop ran out of battery and I forgot the charger lol. However, I can think of something that will fit your needs, but no accurate pricing - I can give you a rough build.
PCCaseGear is a good place to order computer parts - I ordered the parts for my first (and current) custom built PC from there, however the prices you'll find on there aren't necessarily the lowest but it's simpler than ordering from multiple places at once, just so that you may return something immediately if it doesn't work.
A few things about my part choices for you based off knowledge and a little bit of experience. For gaming, no current game at the moment requires a (modern) Intel Core i7. An i5 is sufficient and ideal, outperforming ALL AMD CPUs for gaming and most multitasking/rendering tasks.
Anything more than 240/250gb for an SSD is not worth it price/worth wise. Yes, there are 512/1TB SSDs available and you might be able to fit a ton of stuff on it but honestly 250gb is the most you'll need, coupled with a fast 7200RPM mechanical HDD that is 1-3TB for storage. Another thing, 10+TB SSDs are expected to be coming real soon (2015 or 2016) at affordable prices. I can fit a lot of what I need on my 120GB SSD including a couple games, with other games and other files on my HDD.
My case choice for you might be a bit expensive but I have the same case and it is awesome in terms of aesthetics, stability, usefulness, airflow and cable management. Anyway, here's what I think you should get.
Windows 8.1 64-bit - Around $100
Intel Core i5 4670/90 - Around $220 or $250
H97 motherboard - $100
EVGA GeForce GTX 970 w/ 4GB GDDR5 VRAM - $400
Corsair HX/AX, Antec, XFX, Seasonic 550/650W PSU (750W or 800W if you want to do SLI) - around $150
Samsung 840 EVO 250GB SSD - $100-ish
Seagate Barracuda 2TB HDD 7200RPM Internal - $100
For RAM, Corsair Vengeance/G.Skill are pretty much the best brands, 'however' when it comes to RAM almost any brand will do - $100 for dual-channel 4x2GB DDR3-1600mhz/1866mhz
Fractal Define Design R4 w/ a Window - $150
Total cost equates to roughly $1450-1500 plus shipping (an extra $100 approximately). This is a rough guide, let me know what you think. This computer is capable of running every game out there maxed out at 1080p w/ 60+ FPS based on my research with options for upgradeability.