HI, I'm new to this, and I looked up videos on good gaming computers for my needs. Here are the parts that I found that are priced fairly but I don't know if these parts can go together and if I am missing any important parts to run the computer. (If you see the same part but a lower price, please paste the website.) Here are the parts and links.
XFX Radeon R9 380 R9-380P-2255 2GB PCIE 3.0 CrossFireX OC Video Card=199.89
MSI AMD Radeon R9 270X Gaming 2GB GDDR5 2DVI/HDMI/DisplayPort PCI-Express Video Card=121.22+5.99
EVGA 100-B1-0500-KR 80 PLUS Bronze 500W ATX Power Supply=44.89
ANTEC ONE ATX MID TOWER=54.99
Asus VS197D-P 18.5" LED Backlight LCD Monitor=96.98
(There are 2 Radeons, because one is better but has higher price, the other is lower price. Please tell me which one I should get, and again, if there are better pieces that cost less, give me the links, and if the part doesn't work, please post an alternative, and lastly, if I'm missing any parts, like cords or small stuff like that, again, post the product link.)