I'm a bit obsessed with lightweight kit, so in theory, my choice of Thomson x2 stems on all my bikes seems a bit odd since they're a good 30 grams heavier than other manufacturers, BUT, its well worth it for the extra stiffness.
Their Masterpiece posts are right on the money though, as good as any carbon post out there, and the only reason there's not one of them on my roadbike is that the seattube creaks a bit if a metal post is used.
In theory, I should hate Thomson; go to their website and you'll find lots of quotes from dodgy 'philosophers' like Ayn Rand and other manifest destinarians....
...but when I want a post or a stem that just works I seem to give in.