cdifoto wrote in post #5324799
While it's good to always want to improve, you can curb the obsessive pursuit of perfection because no one dies if you misfocus every now and then. Get a 1Ds III if you want, but don't for one second think it's going to make all your photos perfect.
Precisely!
To draw an analogy, I'm a sound engineer. When I started mixing 14 years ago, had I started on the arena/stadium systems I use occasionally now the learning curve would have been so steep I wouldn't have actually learned anything. Instead I started on small club systems and as my knowledge increased, I started using larger, more complex systems. Only by going through that process of starting small and working my way up could I fully understand every stage of what I was actually doing. Jump in at the deep end and you're unlikely to fully get to grips with things. As well as mixing I'm also a bassist (for my sins). Give my beautiful £1349 G&L L2500 bass to an absolute beginner and it will generally sound pretty terrible, but give an experienced player a cheap, crappy £80 second hand beaten up Squire P. Bass and he'll make it sound good.
Another similar analogy with regards to technical and creative. I use what are known as line array systems (speakers that hang in a long strip, basically). When setting these systems up I have computer prediction programs that help me ensure the system is flown correctly for the venue so I can get a balanced, even sound everywhere in the auditorium. That's a purely technical task and one that if I get wrong, several thousand people could end up asking for their money back, which neither I or the band particularly want. Getting that system technically 'right' is great, but if I then fail to mix the show in a tasteful, musically sensitive way; basically if I just turn that nicely set up rig to the max and hurt people's ears with it, all that is technically correct is absolutely meaningless.
To me the same applies in photography, and I think that's the point people are trying to make. I shoot a lot of aviation, and that absolutely has to be tack-sharp. It won't be accepted onto websites I upoad to if it isn't, so shooting aviation is a great way to practice getting the technical aspects of photography right but even then, technique and knowledge should be relied on more than the technical capabilities of your gear.
My main aviation lens is a Sigma 50-500, but the aperture's seized on that so I'm using my Tamron 28-300 XR Di at the moment; a lens many people slate for being soft. Sure, it is softer than my Bigma, but why is it I can still shoot with a 30D and the 28-200 alongside many people shooting with 1D's and a 100-400L IS and get better results than them? Because I've learned that there's more to a good image than looking at a 100% crop and writing images off because it 'isn't as sharp as it would be with xxxxx lens'. This is where, to me, pixel peeping is utterly pointless and all it will do is make you lose images instead of creating them.
Equipment doesn't make photos; photographers do. That's my main point. I've seen 14 year olds create images on a Powershot point and shoot that have left me stunned. Had they taken them with a DSLR and 17-40L they may have been technically superior, but that doesn't necessarily mean they'd be any more impressive.
I think someone was a little angry when they wrote that article as it goes the long way around actually saying nothing of any real use. All it says is basically 'don't listen to Ken Rockwell, listen to us!' At least Rockwell's article to which it referrs is based largely on an artistic point of view where the main priority is to do that thing we photographers are supposed to do; create images.
On a closing note, I'd just like to say my words are not in any way intened to offend, Chauncey. I'm simply expressing my opinion and you can take it or leave it as you wish. As with anything artistic, you often find people have very strong feelings as to what's the 'correct' way to do things. The only 'correct' way is the way that works for you. All I and others can do is give opinions.
Anyway, best of luck in however you choose to shoot. 
Paul