I have a desktop and laptop computer both with an i7 processor. I also have a Netbook with an Intel Atom N550 processor. Unfortunately the Netbook only has 2 gig of ram while the the Laptop has 6 and and the desktop has 8. The i7 with effectively an 8 core processor is really fast and it is a joy to use not matter what I am doing. The desktop with 8 gig of ram seems to be a little faster than the laptop with only 6 gig, and also the processor speed of the desktop is 2.8 gig while the Laptop is 2.2 gig. The Netbook has effectively a 4 core processor, but the speed is only 1.5 gig. I think that the amount of ram is also a big consideration, and an effective 8 core processor with 8 gig of ram for about a $1000 in my desktop is my preferred configuration as the moment. I saw an ad at Costco for a ZT computer with a 6 core AMD processor with 12 gig of ram for about $600, and imagine that must be a screamer. Also the processor is rated at 3.3 GHZ. For the average user, a 6 or 8 core processor with 8 gig or ram irregardless of the brand will provide them a superior performance. The cost of the lower speed i7 would be comparable to the 6 core AMD 3.3 GHZ, so the issue especially if you go to some place like Fry's Electronics is other features of the computer and the price point. I have bought computers at Fry's, and also other places, but Fry's selection allows you to look at a wide variety of products by many manufacturers and make a decision on that basis. I have a Lenovo Desktop now, and the one before that was a custom made one from New York, and the one before that was an HP. The newest one is obviously the best, since I select my computers to be somewhere in the range between the cheapest and most expensive, and that has served me well. If I keep the latest Lenovo at least 4 years, the cost per year is about $250 which is less than $1 a day, I consider that very affordable. If you pay $3000 for a super computer, then you are a little loath to move to a new one due to the amortization cost. $600 to $1000 today will get you a very good computer. Rather than AMD or Intel, you might want to make you decision on other factors. Whatever you decide, I am sure that it will serve you well. All of my computers have Windows 7 64 bit except for the Netbook which has Windows 7 32 bit.