The platform that an arcade controller works on may be a lead factor in your decision regarding whether or not to buy that controller.
The KBHX-02 could very well be the first fighting game controller with ventilation in the history of humankind.
Order your Kombox Impact preassembled with Sanwa buttons or in DIY format, and there is a joystick edition too.
The Haute42 M16 can also be a WASD controller. As for the M13 edition, it has three less buttons than the M16.
If there's a most innovative award, the JTechWorkshop would definitely be a contender. Its leverless controllers have highly custom layouts.
The Punk Workshop Leverless U provides a plethora of features, such as slimness, many layouts, different colors, and custom art.
The Clutch's two most unique aspects are its faster-than-average microswitches and ability to display two colors on top.
The T series of Haute42 controllers comes in 16 or 13 button versions to suit your fighting game preferences.
The Glyph is a modular all-button controller that is available in layouts for games from Smash to Street Fighter.