I really like the cd pad...hands down the best non joystick controller, just barely edging out the Saturn in my opinion, but if you are going to be playing any fighters, do yourself the favor and get a standard AES controller. Much easier to use for fighting games
I perfer my CD pad for shooters / puzzlers...and the AES pad for fighters (have both a cd and AES system)
Wish I came across them that cheaply..As for the AES no specific version is more expensive, but of course a non-modded one can be had for about $100.
I use the Fighting Stick Neo II from Hori, it's definitely better than than the original and the bean controller in my opinion. It's heavier and sturdier and the buttons have a nicer feel to them. The CD joypad is great for shoot 'em ups.