Recently got my first scientific bong. Starter piece...Stone Glass Works inverted showerhead with a L. wilson DD slide, its about ~18 inches tall, stemless showerhead tube. Pic: It's hits pretty nice, no drag but I'm already thinking about upgrading, I was thinking either getting a bc2011 a/c now. Or sell my current tube and buy a SG stemline. I would love both but currently I would need to choose one or the other. Thoughts?