Whats the best system for a 2004 HEMI (single cab)?

Whats the safest shot?
(100)

What spark plugs?
(ngk tr5)

I found a ZEX kit with everything needed and included from ZEX at 575.00
I hear it is the safest.
Personally I've toyed around with Nitrous Express & NOS, but never ZEX.

I do know ZEX has the ability to adjust the shot according to bottle pressure which most systems out there dont.

I feel this is very important, but then again you can always run a bottle warmer and keep the psi at 900-1100 just with the warmer itself.


SO what are your opinions and recommendations?

Thank you