Am sure this has already been answered(don't have time to read all 220 posts at the moment) but hardly anyone uses an optical drive. Well maybes for watching or ripping DVDs. 5.25" drive USB enclosures are available.
The O11D Mini Snow edition case is nice. Just bought one last week for £108. It will take me about 9 months to get all the parts together for my first upgrade in 10 years though.
You probably be better off and spending a bit more than $30 on a case. The Corsair Air 540 is a nice compact case. Look on eBay, maybes there is one going second hand?