This thread is ridiculous. 06SG is not happy with his SG because it's an SG. Move along. If Gibson changed the SG to be thicker with different frets and different wood and different neck joint, it wouldn't be an SG, would it?
I know! Why not make it a single cutaway? And drill it out for weight relief? uff.
You might have luck with a Fender with humbuckers. If it's not heavy enough for you (it won't be), you can bolt some washers to it. Want a thick, 10lb Gibson? Try a Paul.