Kempffer :
The 280x is a rebadged 7950/7970 so yes, you're right on that part.
Are you looking for a prebuilt computer with that, or parts to create your own computer circulating around that card?
A pre built PC from www.ironsidecomputers.com , I'm not comfortable building my own pc lol and this is going to be my first gaming pc as well. I'm not sure what CPU, Motherboard, or power supply I should look to get. I know I'll be getting 8GB of RAM at 1600MHz, a Cooler Master Hyper 212 CPU cooler, Western Digital 1TB caviar black hard drive, and I'm debating on which case would be best for me based on the end price.
I've put together my first gaming pc 3 weeks ago and it was actually really easy, I enjoyed it and I just want to build another one baha. I was really worried at first but its not as bad as you think. Plus you can get all the parts you want and learn more about computers.
If you want to build your own:
PCPartPicker part list /
Price breakdown by merchant /
Benchmarks
CPU: AMD FX-8320 3.5GHz 8-Core Processor ($149.99 @ Amazon)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($29.99 @ Microcenter)
Motherboard: Asus M5A97 R2.0 ATX AM3+ Motherboard ($92.99 @ NCIX US)
Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-1600 Memory ($57.99 @ Newegg)
Storage: Kingston SSDNow V300 Series 120GB 2.5" Solid State Disk ($79.99 @ Amazon)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($59.99 @ Microcenter)
Video Card: XFX Radeon R9 280X 3GB Video Card ($313.50 @ B&H)
Case: Antec One ATX Mid Tower Case ($39.99 @ NCIX US)
Power Supply: Corsair Builder 600W 80+ Bronze Certified ATX Power Supply ($64.70 @ Amazon)
Optical Drive: Samsung SH-224DB/BEBE DVD/CD Writer ($14.99 @ Newegg)
Operating System: Microsoft Windows 7 Home Premium SP1 (OEM) (64-bit) ($89.00 @ Amazon)
Total: $993.12
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-12-11 03:41 EST-0500)
VERY similar to my build, except I have different RAM/SSD/HDD/Case/Optical.. along with an HD 7950.
Other than that it's pretty much my build but better.
But if you're looking to make a prebuilt pc from that site, you could go to "Customize a PC" and change it up to match the build I suggested (and make adjustments to whatever floats your boat).
http://www.ironsidecomputers.com/index.php?main_page=product_info&cPath=28219&products_id=84&zenid=6e5e2d3ce253b36a837354992a373dff
For CPU, you could get the FX 6300 (it's great) but if you wanted more cores (games at the moment don't utilize all eight cores, but maybe in the future they will. The new consoles that just came out use 8 core processors), you could get the 8320/8350. The 8320 is ~$50 cheaper than the 8350 but can easily overclock to the levels of the 8350.
For the Motherboard, there's the M5A97 R2.0 (What I have), the Asus M5A99X, Asrock 970, just a few suggestions (if you want more let me know).
For PSU, EVGA, Corsair, SeaSonic, XFX seems to be the most preferred. As long as they are certified, they'll be fine.
edit: It is ALWAYS a lot cheaper to build your own, rather than buy a prebuilt. Trust me, give it a try! You don't know unless you try.