Earth is already a fantastic name. Earth is simple, one syllable. Say it. It feels like dirt in your mouth. You say Earth, you can almost feel the water soaking into the soil, plants spreading their roots. I agree that Gaia is also a pretty name (I feel nothing for the Terra, save when paired with Firma, but that too is plain. Solid Ground, it pretty much means), but Gaia is wrapped up in a silly mythos. We have Earth, it's good. No storm gods required.