There is this article
Why go Pro when iMac goes faster? | Business Center | Macworld
And yes it is a pro but expect the imac to be much better than the macbookpro.
You are a little wrong in your summation of that article you linked. It's nothing to do with Macbook Pros. That article is imac vs Mac Pro. And it basically says im most categories the i7 is the way better machine. At half the cost.