My favourite pen is actually my cheapest - a Platinum Plaisir (a Japanese company - I see the author mentions Platinum pens). I bought it in an airport when leaving Japan in order to use up some left-over cash. It looked a bit crappy and I was surprised to find, first, that the plasticky body was actually metal, just somehow made to look like cheap plastic - and then, that it wrote really well. I still think it looks a bit crappy, but it's a pleasant case of a product being far better than it appears.
I still wouldn't advise going to any trouble to find one, though. Something like a Kaweco Sport - almost as cheap - is practically as good and, in the UK at least, much easier to find.
The article might be on to something in focusing on ink - that could well be the most important bit, much as the most important bit of your record player is the cartridge (hm, there's an analogy here that isn't quite what I intended). Different inks in the same pen can make or ruin your writing experience.