I have a definite favorite next generation nail for my enail! I use the Concentrate Connoisseur accessories Liger Banger with quartz insert. It is hands down the best tasting, best hitting nail I have used on my enail so far. It's a really nice titanium banger that works great with the enail by itself. I also like that it fits all female and male fittings I have and has a removable direct inject tube to keep everything clean. Add the Quartz insert and the flavor is unmatched. This is my daily driver, thousands of dabs taken from this nail and still on the original quartz insert. The US made molded quartz seems to hold up much better than any other quartz I have owned. There isn't even any hazing or cracking after repeated torch cleanings.
I'll post pics of the quartz insert later, it is actually double sided with a big dish and a shallow dish on the back side. That means the quartz never actually touches the titanium, it is just fully surrounded by the 710 degree Ti and vaporizes in the quartz via convection. It really is the best thought out nail I have ever used. The owner Josh was very helpful too and customized the storm cell cap I got to go with it. This nail gets my vote so far although I haven't tried the CCA Zeus with upcoming quartz insert or the Happy Daddy Genesis with quartz insert, nor the SiC and Sapphire discs. they all look pretty awesome as well. I will do an in depth review on this Liger as well as the Zeus, Genesis, and others as I can get my hands on them. I'll keep you guys posted.
As far as the actual E-nail I use the greenlightvapes higher end LCD model that uses an Omron e5cc PiD. This works SO MUCH better than all of the $130-$150 chinese enails I have tried. It cost around $299 retail but you can buy off alibaba direct for around $235 shipped. I highly suggest this combination.
http://www.cca710.com/titanium-quartz-nails/
http://www.greenlightvapes.com/productsdetail.asp?id=4