This was one of my first vibes, and five years later, I still use it. It's not terribly loud for the price range, and you can use it for clitoral and G-spot stimulation, as well as using it like a dildo.
Jelly Penis Vibe
Now if you're looking for something more basic, the Slimline G that J's Alley recommended is a good go to vibe that works well for clitoral stimulation.