9/11, I understand why you posed the polls, and I truly do understand where you're coming from. But I think in the end, you'll just complicate the issue, and will ultimately make yourself more confused.
Let me share a few thoughts, to help you put your mind at ease. Every maker has an incident of malfunction somewhere, and the problem is that when you open the floodgates, people who have even the silliest complaints come out of the woodwork when presented with the opportunity.
To dismiss an otherwise reputable maker for a handful of complaints would be unfortunate. If I went solely by the negative things people said about the Walther, I wouldn't have 500+ rounds through it without a single malfunction. Now,
that's reliability, and it will only get better with use. Like many other items, if a flaw in design, materials, or workmanship exists, it will evidence itself in the first few hundred rounds.
One member here summed it up very nicely in another thread when he said (to paraphrase) that a gun, particularly a semi-automatic, is a miniature machine, and any machine can malfunction. There is no 100% guarantee. But, you can hedge your bets by buying the best you can afford.
Think of buying a gun as though you were buying a car. As a general rule of thumb, the more you spend, the more reliability and lifespan you get. To draw a parallel, compare a Dodge Intrepid to a Mercedes S class, and you'll understand why better firearms are more expensive. Yes, there are exceptions to the rule, at both ends of the spectrum such as the 'diamonds in the rough' and overpaying for the 'mystique', or 'prestige' of the brand, but the general rule seems to work.
You're definitely asking the right questions, and I think you already have a good bead on the makers whose reputation is established, and earned through quality.
That said, among those better guns, pick what you shoot well. A gun that's 100% reliable is 0% effective if you can't hit what you aim at. Conversely, a gun that's 100% comfortable for you that is a poorly designed, machined and assembled, is just as useless, unless you throw it like a brick.
My read on this is that for the most popular calibers (9, 40, 45), you should expect to spend ~$500 to $700 for pure quality in functionality. Less than that compromises quality engineering in both design, fit and finish, more money gets you a 'prettified' gun that doesn't go 'bang' any better than a more affordable model.
HTH. Just trying to save you from driving yourself nuts by splitting hairs, and getting into a panic over a few isolated negative reports. Best to get out and shoot everything you can, and then buy what works for you. Remember... if you can get married more than once, then why not so with a gun?