For your first rebuildable I would recommend a clone cause if it turn out you don't think it is worth it a $20 paper weight is better than a $120 one.
The Fogger v4 is not a clone, is made of glass and steel, is dual coil, but it is hard to build properly.
A single coil rebuildable is a lot easier than dual and they generally taste and produce vapor close to what a dual coil will do.
My recommendation is a kayfun or russian clone.
If you really want to avoid clones I would recommend the expromiser. I don't thing there are any clones yet.