I've been doing my N2O homework too, in preparatio of next years mods. I've heard that the Zex kits lose about 17-20% to the wheels on a dyno. Is this true? And, do the NX, TNT and NOS kits fair the same way?
To get back to the topic at hand........no debate for me - my dream set up would be to increase displacement (351), have a twin turbo set up, and a 100+ shot of N2O for some extra kick. I'd love to have the best of all worlds.......but for now it's just a dream!