It's all good-and I appreciate your sharing your empirical experiences with us. However, I've literally had only one malfunction with the 3 Hi Powers that I've had (all purchased brand new, all in .40)-a malfunctioning sear that allowed the hammer to fall to half-cock when placing the gun in battery; the problem cropped up someplace between the 6K-8K roundcount. Browning USA replaced the sear (and concurrently the recoil spring which they did simply as a matter of course given the nature of the issue/repair, despite me having regularly replacing the recoil spring {although today I recommend using only Browning/FN replacement springs}).
The commonly touted 12K-15K barrel longevity and 35K overall pistol longevity figures are currently being empirically questioned by forum member Bill Riehl, who's skeptical-he's of the belief that Hi Powers (and especially the current cast-framed and more thorough-hardened examples) are capable of far greater longevity-it'll be interesting seeing what he ultimately comes up with. Especially with current examples of the genre, possessing more thorough-hardened cast frames and other components.
While a SACS/Warren 1911 undoubtedly has some very desirable advantages over a stock Hi Power, I'm not all that sure that reliability is necessarily one of them; as I recall, Todd certainly had some hiccups during his testing. And we need to keep in mind that Todd's guns were not just SACS/Warren examples, they were really custom bespoke SACS/Warrens, with both SAC and Scott Warren really massaging them for Todd as I recall. A much more valid comparo might be between a SACS/Warren and a similarly custom configured and wrenched Hi Power, say, by Heirloom Precision... Ultimately, I suspect that the SACS/Warren would take the win (a 1911 simply is bigger and with larger components in key areas, capable of taking, absorbing, and spreading firing and recoil forces better for the longevity of both individual components and the overall gun), but the journey might be exceptionally interesting. I suspect that such a Hi Power would be quite competitive, and less disadvantaged than suspected.
Hey, I'm hardly blind to the key advantages and disadvantages of the Hi Power-here's a thread I initiated: http://forums.1911forum.com/showthread.php?t=456583 (we've had a similar discussion here, but this thread was easier to find). And yes, a Hi Power by definition of its trigger/sear linkage is going to have a heavier triggerpull, with a longer reset (i.e., as in letting the trigger go all the way forward to achieve reset). However, in the past 5 years or so, all the commercial Hi Powers that I've owned, handled, and examined have actually had fairly decent triggerpulls out of the box. My current 2004-vintage FN .40 Mk III has a somewhat heavy (but hardly prohibitively so) pull, but it's very smooth and crisp; I've not felt compelled in the least to submit it to an action job.
Is the SACS/Warren a better 9mm single action than a stock Mk III Hi Power? Undoubtedly so. But when you factor in real-world pricing, real-world actual availability, and the capabilities of qualified Hi Power gunsmithing potentially leveling the playing field if desired, I think that the Hi Power is still a viable contender. And yes, I'd still recommend a stock out-of-the-box Hi Power over any 9mm 1911, until you get into the more rarefied stratosphere of semi-custom and full-custom 9mm 1911 builds, especially for out-of-the-box reliability.
Best, Jon