No telling how Intel's old architecture would perform from those measurements, though.
In fact, I'm not sure how to come to the architecture conclusion. Similar architectures at the same clock speed gained performance when going from dual core to quad or tri-core. The differences between Intel and AMD aren't a surprise at all; Intel almost always outperforms AMD at the same clock speed.
I mean, I just said that the architecture had to be similar because I seriously doubt that a Pentium D at 3.0GHz would achieve the same performance as an i5 at 3.0GHz. I'm not sure what you mean when you say that they gained performance going from a dual to quad/tri-core. On the second chart, the Phenom II gained 2FPS from an X2 to an X3, .3FPS going from an X3 to an X4, and it LOST .3FPS going from an X4 to an X6. If you're referring to the difference between the dual-core i3 and quad-core i5, keep in mind that the i5 is just a faster line than the i3. That's the whole point. If you compared a dual and quad-core i5, I'd be willing to guarantee that they have similar performance.
And when you say that Intel almost always outperforms AMD at the same clock-speeds; that is true for these past generations. Back when the Pentium 4/Pentium D and Athlon II were the new thing (and even before that), AMD absolutely blew Intel out of the water. However, Intel has been on top since the E**** series.
I think overclockers is pretty good, but the best I have purchased from is probably scan.co.uk
They may be expensive, but like you say we get bad prices anyway (could maybe be due to the VAT increase?). Though sometimes a good bundle deal comes along, the bundles are expensive and buying individual components is too expensive for me (I got my current parts second hand off a family member).
Oh, it may well be better. Overclockers is just one that I'm familiar with.