Well it depends on preference as much as anything.
If you want to run with a vert reg then a screw in system will do.
Three guys on my team run E-blades, 2 use AGD flatline systems which give massive flow coupled to reasonably consistent adjustable output. They then rely on the black magic reg. to provide the final control.
The other guy uses and Angel A.I.R.
All use 68cu tanks. If you want a flatline setup i've got one for sale with a 68cu tank. PM me if you are interested.
Laterz
Ian