Mike, it seems like maybe a logic check is needed here more than a reality check. Any idea what some of those Harrison or Neve boards cost? THAT'S the reason why most of us buy decent outboard preamps And nobody ever said you need to spend $3000 - some of the best outboard pres you can buy are anywhere from $600-$1250 per channel street price. Although, admittedly, you CAN spend more. But a Cranesong Spyder, a Grace 801, a Pendulum Audio, an Avalon 2022, or an API 3124+ are all preamps which any engineer of any level would be thrilled to use and fall within the above price range (per channel). And even a bunch of them is going to be exponentially cheaper than buying a new Harrison or Neve board at $300,000 or so.
Of course it's all about the music. And all about room acoustics. And all about mic positioning. And all about lava lamps. Blah blah blah... Nobody ever said you can't make good stuff on a budget. But if there was NO advantage to having some decent gear, no one would ever bother to buy any. And whatever you are using, there's no reason to delude yourself that using the built-in preamps of even a Neotek Elite is equivalent to using those of a Mackie.
And by the way, if you were to go out and buy, say, a new Neve Libra today, guess what? The preamps ARE outboard! They come in a big-ass seperate rack and you can buy various types and configurations to meet your individual needs.