My PC is on its last leg. I am new to Apple, having purchased an Ipad and Iphone within the last year and am impressed with the overall quality and functionality. I am limited on funds and the best I can afford is a refurbished Mini (2.3ghz i5). I am considering going with this, with the intent of upgrading the RAM to 8g and upgrading the hard drive to an SSD. Just looking for general input as to whether or not this would be a good idea. Any concerns I should have? Are these relatively easy to upgrade? What performance can I expect from this machine right out of the box compared to a 2.4ghz Core 2 PC from 2007? Also, it apparently is eligible for OS X Mountain Lion update program. What does that mean? What OS is included and is upgrading recommended at this time? Thanks for the assistance.