Thanks for all this input. I think, for my purposes, I now understand things a bit. (I came into this naive.) Basically, it seems for most gaming purposes (which was my interest), the super-fast access to HDD is not actually an issue, except maybe in those situations where the load to the disk is paramount (as in online games) or leveling up with some ultra-dense graphic-heavy games like Crysis. Also, the idea of shaving seconds or milliseconds on load times or disk read (as often shown in benchmarks) become of little use when both the speed of disks for the general public has gone to 7200rpm and memory is getting so cheap/motherboards-CPUs getting faster.
Now that I think of it, I had memories of waiting in the middle of action or when leveling up while the game appeared to be slowly access the HDD. This was probably more of a memory issue. And, of course, I know see clearly that the FPS/video quality and consistency is mostly tied up with CPU's and GPU's.
Finally, I'll have to admit to being one of those who has gotten suckered in by all this talk of tweaking systems, without understanding the basic issues. I know when I bought my first system a few years ago (though I am of a certain age, I was completely new to gaming), I just got things cause it sounded like it would be faster/better. 2 disks in RAID 0? Sure, I've heard that speeds things up. A CPU cooler? Sure, even though I was far from at the latest generation-maximum power fiend CPU, and I am not overclocking anything.
I can image it is frustrating for people like you, who though you may disagree on points, at least understand the issues involved. So, again. Thanks for the time and education.