I think the Storm is more advanced and you will get better customer service. Check also the Herbstick Eco for a cheaper but equally good alternative. Then the FlowerMate VT1 which isn't bad but a bit of an underdog. People also enjoyed the iMag+ but I haven't tested it.
Then if you go higher in range, there's the Focus as
@His_Highness said, and the Arizer Air. That's about it for "pen style" vapes with a single battery cell.
If you want something of comparable power and capacity but in a different form factor, consider the FlowerMate 5 Mini, FM5 Mini-Pro and the Goboof Alfa. And of course the Pax 2. They are all similar ceramic oven conduction vaporizers.