Trying to find a new base location

As I am in the middle stages of the game I want to find a new base location as my old one in the shallows ain't cutting it. I want and easy access to different kinds of minerals and some lava geysers for energy. The new location should have enough space for large buildings and rooms. It should be noted that I should be able to reach the place with my seamoth as it is my favorite vehicle. Some choices I think would be nice are the tree cove,mushroom forest,underwater islands. Please leave your suggestions below btw I don't need a food supply as alien containments do the job very well. Thanks.