Budget low-powered quiet HTPC/Light Gaming PC ($500)

Approximate Purchase Date: December 2012

Budget Range: $500 max

System Usage from Most to Least Important: Watching movies (xbmc, plex server), gaming

Are you buying a monitor: Using TV

Parts to Upgrade: Not reusing parts

Do you need to buy OS: No

Preferred Website(s) for Parts: Amazon, Newegg

Location: Clearwater, FL

Parts Preferences: by brand or type: I'd like a low-profile case, SSD, and NO optical drive.

Overclocking: No

SLI or Crossfire: No

Additional Comments: Looking for a low-powered (like nettop/mac mini power usage) pc to run a Plex media server, xbmc, and do some light gaming (Sims 3, maybe some games on steam?) I don't do much computer gaming, since I have consoles, but I might want to dabble. I don't need to run them at the highest settings. This is something I may want to leave on 24/7 or do a WOL, so I'd prefer a low-powered machine.

And Most Importantly, Why Are You Upgrading: Would like something to run my media on/play games on my TV.

I've tried to look up suggestions online, but there is just so much out there, and I wasn't sure what would be best for my needs/budget. All suggestions are appreciated!