Is this the best MAME cabinet racing wheel?
It's the best reasonably priced wheel with a clutch and shifter for racing sims and PC games. This wheel is the current standard, so everything is made to be compatible with it.
There are others that are better, but the prices get astronomical and they don't have logitech profiler which is a life-saver when it comes to setting up emulators.
For MAME, there's really no way around needing two separate wheels for 270 and 360 degree wheel games. Even though this has 900 degrees of rotation, pole position still isn't playable with it. The only MAME games that will benefit from the 900 degrees of rotation are Hard Drivin' & Race Drivin'.
If you just want something to attach and remove, you could find a cheaper one with the sequential shifter attached to the wheel base (or just use the paddle shifters).
RacerMAME will allow you to use the sequential shifter or paddles on 4-speed games.
The pedals that come with those won't feel as much like real pedals as the G27, but they'll work.
The wheels also usually look more "plasticky", but again, the game will still play just fine.
Personally, I don't care for the G27 shifter. It just doesn't feel like a real shifter or arcade shifter. My old act labs shifter is fairly flimsy, but the throw is about the same as an arcade shifter and I keep the 4 speed plate on it, so it feels right. I'm not sure how to describe the G27 shifter. Guess it feels like an undersized game controller.
If I ever get around to building a racing pod, I'll probably stick with it anyway since I already have it. Off the top of my head, the only game in MAME that uses a 6-speed is ridge racer (takes a beast of a pc to run), but it also has the option for sequential. I prefer to use the paddles.
If you just want to test the waters, find yourself a used Logitech MOMO or Driving force for around $40.
Stay away from the Wingman Formula Force and Sidewinder wheels as they are ancient and use a different way to communicate ffb that only works with a few very old games.
Also stay away from xbox 360 wheels. There are no pc ffb drivers for them.