I wish I could tell you which one but I am still trying to figure out which one I want to get next. I have the Ella and she is pretty cool but I really want something with vibrations so next for me is Mona or GiGi.
I've only got two, but I absolutely LOVE my Alia. Rechargeable, waterproof, ergonomic, decent vibrations... can't find a fault. And even though vaginal stimulation can be a lot of fun, when push comes to shove I'm all about clitoral.
Interesting to see the Ina get the top pick. It's a nice toy but at least in my experience and as is true for many rabbits, is extremely anatomy depending. It was miserable for me. I eventually gave it away.