I know this is from 2 years ago, but how has the Crucial SSD been, long term wise, in the Mac mini? This article mentions that Crucial is fast, but fails often, and these folks deal with a lot of Mac minis:
https://macminicolo.net/blog/files/some-lessons-on-mac-minis-and-ssd-options.html
I have a late 2009 Mac mini with the buggy controller and a Transcend 256GB SSD which runs at 1.5gbps [it's SATA III, which one should never buy for the late 2009 Mac mini, as I learned later]. From the comments at
http://blogs.helsinki.fi/tuylaant/2014/01/upgrading-old-macs-to-ssds/ it looks like Crucial BX100 SSDs will only run at the 1.5GBit speeds as well, but the M500 will work at 3.0GBit speed. I wonder how dependable the M500 is...? :\