Gathered parts over several months and this is what I came up with. I hope it helps you with ideas.
Processor: Core i5-4690S. I bought this processor back in May (14) and thought I was going to install it in my small form factor build. I purchased another processor for that build but did not return this one. I love the S series processors from Intel since the TDP is merely 65 watts. This is a great mid range intel processor if you are looking to game and want low power consumption
Motherboard: This motherboard came in a combo that I purchased for $98.31. The motherboard has everything you could want for gaming including USB 3.0, PCI-E 3.0, 6 USB ports, and all the onboard video outputs. Please note this board is cheap and flimsy so you have to baby it. Other users have complained about heatsinks being loose. Check your mainboard thoroughly before adding components.
Memory: Kingston HyperX DD3-1600. Standard ram that was purchased with the motherboard.
Storage: PNY Optima 240 GB. First time using PNY SSDs. I use SSDs in all my builds now as they have become relatively inexpensive and have great performance. I cannot comment on the reliability of this drive. Please feel free to share your experiences below if you have used PNY SSDs. I have a 1TB Hard Drive on order and will install it as a basic storage drive later.
Case: Raidmax White ATX tower - This is a nice tower for the price $21.84. I would highly recommend it. The installed fan is quite and the tower seems sturdy. It has a bit of plastic and the metal is thin enough that you should use care when installing components and transporting but should hold up nicely if you are not rough with it. Some reviewers have complained about receiving dent panels but mine was perfect.
PSU: Corsair 430W Builder Bronze. Removed this from my HTPC build. This is a solid PSU and you can almost certainly find a rebate for it. My cost was $19.99 after rebate. Now that Intel Haswell and Nvidia Maxwell products have great power efficiency, you should be able to use this power supply for even the most powerful builds. This PSU will not be able to power an SLI configuration, high powered ATI video card, or extensive builds. Its perfect for my build though.
Video: Onboard for now. You can assign up to 1 Gig of system memory for video from the motherboard's bios. I may install a 750ti from another build when I purchase a Nvidia GTX 970. Feel free to make any recommendations you like.
Operation System: Linux Mint. Steam has over 700 games now for Linux and I am going to tinker with this build or sell it. I still haven't decided. I am hoping I love using Linux so much that I will be able to finally able to ditch Windows. So glad my games are being ported to Linux.
I installed Linux Mint with a PNY 8GB Thumb Drive. The installation took roughly eight minutes. All that is needed is the correct OS or in my case the 64 bit version of Linux Mint and a USB installer to move the image to a usb drive. Boot to the usb drive and download click on the "Install Mint" icon. Follow the prompts.
Total Build Price: $500.15