8/2
Research the 3D before you buy it. Mine was by Cigreen and it's unusable it's so bad, but I understand from researching, even the originals are bad. You may have better luck than me, but I've heard an awful lot about problems with all of them.
I love my EHPro KFL+, but I'm not as impressed with my Gennies. My two very favorite toppers are the KFL+ and my Magma. Both are easy to build on, and have great flavor.
Anyone else want to comment on what I said? I don't want to steer anyone in the wrong direction.