hey i was just in the market of an aftermarket computer but i havent really got any idea where to start i want one that if preferably changeable as my mods change also. i am pretty much searchin in the dark at the moment with only a couple of names in my head like E-manage, haltech and motec but still really no idea so i was just wondering if the public can fill me in whats good for different prices and what they do?? also what u have to really do to install them?? can u just chuck em in and off you go or what????