I wanna throw a Noise Gate into my effects loop on my B-52. Should I get an MXR M135 Smart Gate or an ISP Decimator? What's the major difference between the two? Also, would I put this before or after my Sonic Maximizer in the effects loop? The sonic maximizer is the only thing I currently have in the loop.
The ISP is the best, I would guess you put it after the Sonice Maximizier.
Noise Gate goes after all the effects in your rig.
Consider the Boss NS-2 also. The noise gate doesn't always go after all your other gear. Things like a volume pedal or reverb would go after it.