In our household we refer to Hitachi's Magic Wand as "Old Faithful"
The 2 speed vibrator with the big head can rock my Lady's necessary spots, and the fact that you plug it into the wall means there is never a die-down just when it's necessary to maintain the stimulation. Just leave it plugged in beside the bed.
We have a few penetrating vibes, some purchased after rave reviews here at TFP, including a dual action penetrating/massaging rabbit vibe, and a curved g-spot penetrating vibe, as well as a vibrating cock ring . . . they aren't a patch on Old Faithful.
Of course, if your interest is simulating DP, look for something else. But if you want your lady to develop the ability to have multiples while squirting, try the Magic Wand. It works for us.