Find yourself feeling inspired by all the Steam Machine announcements to roll your own dedicated box? You won't lack for options, that's for sure. If you've been considering a micro ATX motherboard as your foundation, there's no need to invest in a full tower chassis. One alternative is featured as today's top deal -- a Corsair Obsidian Series 350D Micro ATX Case for $100 with free shipping (normally $110 - use coupon code: [EMCPWGP34]; additional $10 mail-in-rebate). This mid-tower chassis has two USB 3.0 ports on the front panel, two external 5.25-inch drive bays, two internal 3.5-inch drive bays, and mounts for up to five cooling fans (two included).