There are so many options outside of the ones you listed here, I would actually go with one of the fleshlight ladies bcs they are so gorgeous and there are different types of internal sensations avalable (ie:lotus).
My man has the vibro lady original so I voted for it, but we have nothing to compare it to. I like it because I can also use it for clit stimulation. With all three bullets inserted and on, I rub the clit on mine and it feels really good and gets me off pretty quickly. So, especially if you have a wife/girlfriend/partne r who would be interested in that, it is the best choice in my opinion.
I'd seriously go with the Wonder-Wave texture. (I think EF has it in the "Ice" variety.) It's the boyfriend's favorite.
Aside from Wonder Wave, he also enjoys the Vibro, but not the original version.
If you are going to go for anything, I highly recommend against the original. The textured versions feel so much better. We had the original, he hated it, and never wanted to try a Fleshlight again - especially for as much money as they cost. It's just going to feel tight - there's no texture to it.
STU is a pretty big change in intensity compared to the rest. If you are not sensitive, I'd go with STU. If you are *Extremely* sensitive, go with original but be forewarned the lack of texture may make you hate it.
Like another reviewer, I'd highly recommend a Fleshlight Girls product. Ignoring the fact that they are modeled after girls, we one does have a unique texture. The boyfriend has fallen in love with the Tera Patrick Twista lately.
After extensive research, I recently ordered a number of different textures. They should arrive soon and I'll post my results. From what I read on the forums, the STU (STAMINA TRAINING UNIT) seems to be the most highly regarded choice. Most of the posters feel the STU should be in everyone's inventory. Other popular textures are Wonder Wave, Swallow, Destroya, Primal, Twista and Alien. There are WELL over 50 textures available! I'm just hoping that the ones I ordered are truly different from one another.
STU is considered by many to be one of the best... but it really does vary from person to person. I got several of mine when they were doing 3 pack specials direct from Fleshlight and they all are unique and I don't really have an absolute favourite... they are just like women... unique and different from each other but not necessarily "better".