I am very computer illiterate and am requesting some very basic help comparing two machines. My parents currently are using a slimline Dell as their HTPC with the following specs: Intel R Core 2 duo CPU E7500 @ 2.93 Ghz; 4 GB RAM It's been nothing but a headache, and I want to get them a new computer, a Mac Mini, with the following specs: 2.5GHz Dual-Core Intel Core i5; 4GB RAM Can someone please give me a quick snapshot as to the difference between the two machines? If the Dell is a 4, is the Mac a 9 in terms of speed and performance? I just don't know how to interpret the GHz and core information. They are going to use the computer to stream 1080p videos on Netflix and Youtube, watch 1080p videos and view pictures on their local storage, and Skype. The Mac Mini should be more than sufficient, right?