I've learned through experience that I'm fine without vibrating toys. The vibration rarely adds to the stimulation for me, and sometimes even weakens it. That, and I never have to worry about a solid chunk of silicone's motor dying.
I really love g-spotting dildos (I'm looking at you Pure Wand), so I would imagine that a g-spotting vibe would be awesome too! I don't have one (yet), but I'm saving up for a few that I have my greedy little eyes on.