Hey there, Ok so I have a 3 pedal BOSS board. So far I have two of the spots filled with a tuner pedal and the OD-3 Overdrive pedal. For Christmas I received some gift certificates for my local music store to complete the pedal board. I have been listening to pedal demos all day and would like to hear your suggestions and why. Has to be a BOSS pedal and if it helps I mostly play classic rock to heavy metal and some punk stuff. Cheers.