While you got Sanwa, Seimitsu and even Hori making reliable buttons for fighting game players, there is a funding project for a new button with some interesting technology.
Taiwan fighting game player Pei "Milkshark" Kao is the mastermind of this new button titled the HBFS-30, short for "Harder, Better, Faster Stronger/Silent." Milkshark intends to make the HBFS-30 feature shorter operating tension for quicker button triggers as well as have longer life than other buttons in the industry. Along with the button cap and base, the HBFS-30 will feature cushion sheets from Poron and Cherry MX microswitches found on various keyboards. The microswitches are available in four types: two linear switches with one having harder tension, a soft tactile switch and a clicky tactile switch. Milkshark also intends to have the HBFS-30 feature sound reduction.
Milkshark is aiming for an $8,000 goal before August 31. You can help donate on the project's Indiegogo page (all funds will be refunded if it doesn't meet its goal) and you check its Facebook and YouTube pages for updates. There are multiple donation options with rewards if it succeeds including getting a set with multiple microswitches. The project can also be found on Shoryuken's Tech Talk forum here.