I have a stock 07 reg cab 2.9L 4 cyl chevy colorado with an K&N cold air intake that gave me 20 hp with after market exhaust that gave me 15 hp on it, i also have chrome polished headers with an add. 20 hp with a few mods on the motor up to bout 30 hp.. The question is should i get a supercharger or a turbo and how much hp should i be geting with each for my truck and what mods come with them... and if i get the supercharger, is a blow off valve and ethenol gonna boost it even more

reason being my truck only weights 2,386 lbs as it is right now, should i see a big differnece or just a little difference in speed and torq