hi guys, ive been looking at these things and i want one! my friend has one and i gota have one too. i cant spend more that 150-175 bucks but my friend says i better get one with multiple channels in case of interference. there are like 50 different ones on guitarcenter.com so i dont know whats good and whats bad. my friends is about a 300 dollar rig, and im not paying that for one so i need help! just curious if anyone had used one, or recommended one.