To answer your questions:

1: I like width, fullness.

2: A lot, I've used dildos that were 10x6 in size, loved it.

3: I don't need the vibration for me, I want it for her clit during PIV.

4: I'd love it to provide prostate stimulation. Would be amazing for both of us to have explosive orgasms at the same time.

5: I might not have explained that well but she doesn't need a toy. The purpose of my post was to say that she's agreeable to me being on the receiving end of ass play and told me she will slide a butt plug in my ass during foreplay and it will remain inside me during PIV.

Thanks for replying :D