hi ,help needed here,my stepson has been playing for 9 months now and is interested in a couple of effects pedals for playing a sound similar to crazy train or black sabbath, or a metal sound,we are on a tight budget at the moment. can anyone recommend a metal pedal,and another one to go with it to try to get that sound,he plays a les paul copy with mity mite humbuckers through a marshall 15 amp.any help would very much be appreciated