Speed-Tech and WH are the best answers to two different questions. You have to decide which of the two questions you're trying to answer...
I had the good fortune to take a long look at both the Speed-Tech and William Henry offerings at Blade Show West, and I must say, William Henry make the absolute finest semi-production "gent's knives" on the market. To get any better, you'd have to go directly to a custom maker, sign up, wait in line, and all that. This is the furthest up you can get on the "pocket jewelery" scale in a production knife, though you won't be felling trees or hacking your way through the jungle with this one, not in that tux, anyway.
(I would have to add that the largest of the WH knives seems small-to-medium sized to me; you said you wanted a largish knife. And, IIRC, only the CF WH's have clips, the rest having pouches.)
Speed-Tech, meanwhile, is in the process of building the very best Tonka Toys on the planet. Speed-Tech and TiKnives are both trying out-MicroTech MicroTech, and it looks like they are succeeding -- building space-age folders with all the latest miracles of hi-tech, technology, CAD, CNC, and futuristic looking designs -- things the aliens will ooh and ahh over when that saucer lands at the local mall on January 1st, 2000.
So, the question is a little like, "should I get a Rolls Royce, or a Ferrari?" -- it really comes down to a personal decision on which you think best fits your style. For opening your mail, they're both wretched excess, and it's just a question of which flavor of wretched excess you prefer
(Of course, the obvious answer, at least in the long term, is,
get both.)
(And, dang, I didn't realize that TiKnives had anything sub-$500 or anything non-auto, or I would have spent some time at their table. I think the Synergy is really more my style, but for the kind of money we're talking about here, I'd have fewer reservations about making the choice for myself if I'd taken the opportunity to fiddle with a TiKnife.)
By the way, something really cool that wasn't apparent to me until I picked up a Speed-Tech and played with it: it doesn't have your conventional pivot pin, it has an interesting bearing setup (they had a cutaway knife that showed all), and the hubcap-like cover at the hinge point
rotates with the blade. Very nifty
My $0.02...
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Carl /\/\/\ AKTI #A000921
Think this through with me ... Let me know your mind
Wo-oah, what I want to know ... is are you kind?
-- Hunter/Garcia, "Uncle John's Band"