I'm considering buying a new machine and did a search in the forum and didn't find what I was looking for. Here's the question. First when comparing processors is there that much different between a 2gig dual core and a 2gig quad. Second is there that much difference between 2.2i7 quad and a 2.5i7 quad when it comes to speed and everyday computing. Ultimately it comes down to 2.8i7 dual vs 2.5i7 quad but there's a$1000 difference ( screen size also playing a factor into the price) Or 2.2 i7 quad vs 2.5i7 quad with a $700 difference running same screen.