I don't know about all that CPU stuff, etc., but I do know what works for me. Up until about a year ago, I had always been totally loyal to Hewlett-Packard. Every piece of equipment I owned was HP.
But, all of that changed when I stupidly spilled ice water on my HP computer and fried it! Well, I wasn't the most affluent I've ever been, so I started looking around for a computer that I could afford.
Fortunately, I found an honest salesman in the local Office Depot who told me that the eMachines computer, which was relatively new, was just as good as HP, but much less expensive. Well, I took him at his word and bought an eMachines computer and have not yet regretted it. It does everything the HP computer did, at a much lower price.
Bottom line: don't stick just to the big brands!