Do these parts work together in a gaming pc and can I go cheaper? Any suggestions?

This will be my first ever gaming computer and I would like to keep it under 450 dollars. Even cheaper would be great. I'm looking to play games like League of Legends, and Minecraft at high settings. Any hardware that does more than that is unnecessary. I don't know if this is all that i need for the tower but these are the parts that I threw together.

Processor- Intel pentium G3258
Graphics Card- Radeon R7 260X
Motherboard- H81m-E33
Hard Drive- Western Digital Blue
Storage- G skill Ripjaws X Series 8 GB
Power Supply- Corsair CX430
Case- I don't know about the case yet. I would like a cheap suggestion with room for upgrades if needed.

Suggestions for a moniter, mouse, speaker, and head set are welcomed also.

Try this>[[ http://pcpartpicker.com/p/HJWNVn ]]