Check out the Cannondale Topstone Neo 5, best bang for buck IMO. Removable battery, class 3 Bosch system, full carbon fork and fittings for full rack/fenders/lights. At $5k its a great deal and super light, around 41lbs. The Diamondback Current is another class 3 gravel bike but the fork on it is incredibly ugly and heavier than the Cannondale. Lower price point though.