Pure Wand and Fling work best for me out of the ones you have listed. I have the Bent Graduate, similar to Amethyst, and it's too poky for me. Ella just doesn't seem to hit the right area. Not enough curve or the wrong shaped curve. Acute doesn't curve nearly enough, nor does Amor. I don't have the Tsumani or Adam, but I can 99.99% promise they wouldn't work on my G-spot.