Can anyone recommend a good butterfly vibe?

Hi, totally newbie on the forums, just wondering if anyone could recommend a good butterfly vibrator?

Would like something that my girlfriend could use during strap-on sex, or wear whilst receiving anal herself.

We quite like the idea of one with the small penetrative penis, but not sure whether they would necessarily sit well and direct the vibrations to the right place. A good clitoral-only vibe would be just as good.

Would be good to hear about noise levels as well, as the idea of wearing one out in public is very sexy!

Any information or advice would be greatly appreciated!

My experience with butterfly vibrators is that although they vibrate brilliantly and really do the trick if I or my partner holds it, the elastic for wearing them is mostly useless. For me, they've only worked whilst being held, so I don't know if you'll be able to get from it what you expect.

Good luck. :)