The platform that an arcade controller works on may be a lead factor in your decision regarding whether or not to buy that controller.
AllFightSticks provides DIY cases in different sizes, such as the 15.5" Prototype Steel Aluminum Hybrid case.
The KeebBrawler-01 is a mini stickless controller that most notably has a wide jump button and unique attack button layout.
The Sonicon TitanStrike Arcade Fight Stick has Sanwa parts, an OLED screen, customizable artwork, and more.
Certain Deth is a Detroit-based outfit that provides custom enclosures and builds with key, button, or joystick directional inputs.
The Titan is loosely based on the Sega Saturn controller, and one of its many unique features is having a customizable encoder knob.
The Neobox is an enlargement of the open source Flatbox. It also spares you from building a Flatbox yourself.
The Slab Mini All Button Controller is a sandwich acrylic case controller with hot swappable sockets and LED.
After one takes a look at the Sunga G5, the Victrix inspiration becomes immediately clear, and it is up to you to decide which one to buy.