On the other hand, it does appear that Topre is charging more of a premium than other high-quality manufacturers (e.g. Filco or Unicomp).
Topre is charging more of a premium...and most people are gladly parting with their money and paying that premium, with good reason.
Sorry, but as much as I love Jim, Chuck, and all the guys at Unicomp, it is not a high quality manufacturer. I've read many reviews on this board that make me lol when people reference the "Unicomp quality". The four keyboards I've purchased from Unicomp are mediocre at best.
Even though Filco is a Japanese company, it's Chinese and Taiwanese made boards simply don't match the build quality and attention to detail of a board manufactured in a Japanese plant by Japanese workers. Filcos are generally good solid keyboards and provide better build quality than most keyboards, but the Topre Realforce and PKU Fujitsu (essentially Topre) keyboards are better.
The Das keyboard and Filco Majestouch Tactile Click keyboards are both manufactured by Costar using Cherry MX Blue key switches. The Filco build quality seems better than the Das, but the guts are essentially the same.
Edit: I'm in not bagging on Unicomp, I'm just saying that they do not make premium keyboards. However their customer repair service and communication is excellent!
I don't particularly care for Cherry key switches because they are too light (Cherry Blues) or the tactility too subtle (Cherry Browns). Your preference may be different depending on how you will primarily use the keyboard. My primary use is typing, not gaming.
Check out the review of the Chicony KB-5181 posted on geekhack. The plastics are cheap and it is a relatively ugly copy of the IBM Model M, but the key presses are light and it provides a satisfying typing experience. If you haven't had much experience with mechanicals keyboards, this is a cheap, low risk alternative for you. The KB-5181 provides both audible and tactile feedback, but is quieter than the Model M and Cherry Blue key switches. It will work with any PC using a standard AT to PS/2 adapter and microchip PS/2to USB converter (converter costs about 15 bucks). Even though it is an old keyboard, there are many NIB models available from a variety of sources.
I am pleased with my new HH Pro 2 and it continues to grow on me. ripster, webwit, and others warned me that I would probably not like the HH because it so different from the 84-key PC AT monster that I love so much. I'm not very good about taking advice and in this case I'm especially glad that I took a big (and expensive) plunge by making the leap from old school Model F buckling springs to Topre key switches.
If money is not the primary issue preventing you from getting a keyboard, get a HH Pro 2 for its unique form factor, detachable cable, excellent build quality, and most importantly, for the uniform 45 gram sensitivity across
all the key switches. The dark gray HH Pro 2 sold by Elite Keyboards looks exactly like the Topre 23UB black numeric keypad. In this case, I guess gray = black.
Decisions, decisions...