I've been looking at methanol injection kits made by Snow Performance. they have three kits.
one that costs 360 stage 1 http://www.snowperformance.net/stage...st-cooler.html
one that costs 487 stage 2 http://www.snowperformance.net/stage...st-cooler.html
and stage 3 is 803 http://www.snowperformance.net/stage...st-cooler.html
for the kit to be as easy to use as possible after being set up, which one is the best choice?