pigfoot
Dabs are vapor too!
The wedding cake rig should work fine. I'd just make sure to pay good money for a quality quartz or Ti nail. Those supplied China glass nails will disintegrate rather quickly... and I don't trust anything they say is "titanium".
As far as a 10mm Ti nail, I'm looking at these guys, cheap, but with documented US Gr 2 Ti:
http://www.new-vape.com/products.html
I agree with @Caligula ... the glass quality is less importaint than nail quality. a good nail is like having a good vape... but dabs!
Yup, as I've found with the D020. It's more the tolerances on the China glass are looser, and less QC, but they work great!