Bit of a necro bump, but I've picked up a lot more mechanical keyboards in the last few years, and as predicted in the OP, every company + their dog's company is making them now. Making them in every varying type too, it's great. Logitech and Razer have invented their own switches, and there are several besides Cherry out there with varying costs and performance now too.
I know HT (others too as per the thread) are big users of the original IBM M, and the several I have are still my favorite, incredible how the "they don't make em like they used to" phrase still holds true many times, especially in the case of keyboards. Keyboards took a while to get the "sexyness" of other peripherals like gaming mice, LCDs, graphics cards, HOTAS, and everything else, but they did catch up. Considering we use the KB more than anything else, it should.
Ducky Shine 6 - I picked up a Ducky 5 in Brown and Blue last year, and grabbed a 6 in Cherry MX Brown this time around. I've gotten sick of Blues lately, and Brown is my new preferred type. Great KB for the money.
DasKeyboard - not a gaming keyboard, but a great desktop/typist KB, very happy with this one and I'll be keeping it.
Cooler Master Masterkey Pro Tenkeyless RGB - great home theater keyboard, it's small, and has great keycaps, nearly as good as the Ducky double shot injected keycaps.
Last one, I've been picking off mech KB I like when I see them on sale, and my first Gskill has been great, the 780 RGB in Cherry Brown for $100 USD. It has a metal top plate, decent, yet slowish software, a great wrist rest if you use them, and a metal rolling volume switch. Use it a a HTPC keyboard too, the side metal bars/handles make it easy to pick up and move around, and the USB passthrough works OK if I'm not using a wireless mouse in the HTPC room I have it in.
Lastly, the Unicomp IBM buckling spring clones are excellent, and have gone down in price, for $85 you can get a black IBM M "clone" with USB from these guys who bought the rights to the IBM buckling spring design. SO close to the originals, just not quite as perfect, but very close, and for the $, if you don't want RGB or gaming doodads, IMO the best keyboard available for the PC, period.
http://www.pckeyboard.com/page/product/UB40P4ASome cool options for keycaps out there, many vintage and steam punk type caps out there compatible with Cherry switches, I'm going to build a KB with these this fall some time.
https://www.amazon.com/Velocifire-Mechanical-Typewriter-Illuminated-Anti-ghosting/dp/B073GXFS7Q/ref=sr_1_1_sspa?ie=UTF8&qid=1505695635&sr=8-1-spons&keywords=typewriter+keycaps&psc=1https://www.amazon.com/Mechanical-Backlight-Steampunk-Typewriter-Qisan/dp/B0719KZTF3/ref=sr_1_2_sspa?ie=UTF8&qid=1505695635&sr=8-2-spons&keywords=typewriter+keycaps&psc=1https://www.amazon.com/E-Element-Injection-Typewriter-Mechanical-Keyboards/dp/B06Y2B926N/ref=sr_1_5?ie=UTF8&qid=1505695635&sr=8-5&keywords=typewriter+keycaps