Early 2009, upgraded to 8 GB of RAM, and a 7200 RPM hard drive. Was debating for the longest time between upgrading to SSD or just simply going with whatever the newest mini at the time. Then the 2014 disappointment plus the low price best buy had on the i5 for $399; I made the jump.
Looking at it maybe it would be most cost effective if I had simply swapping out the HDD to an SSD, but I wonder how much faster that would actually be (along with having to open up the mini again). But anyways, loving the "new" 2012 model, will upgrade to SSD + maxing out the RAM whenever they are cheap enough. Good God, the DDR3 for 16GB is relatively expensive these days. I remember getting a 16GB for my Macbook Pro a year and half ago and that was around $100. I can't find anything for less than $130-150 right now for the RAM.