After doing some looking into this subject I purchased a Brick Wall PW2RAUD 20A. It has 20amp guts but plugs into a 15amp wall plug & has 15amp recepticles, made for high current audio equipment. It provides the best surge protection, and great power conditioning. The cost was about $100 cheaper, but it does lack switching, and only has 2 oulets. Therefore I use a cheap MOV based strip downstream of it for low current equipment, and only plug the multi amp directly to it. BW also offers a PW8RAUD 15A with switched outlets, but I wanted a higher current protector. I believe the Monster 3500 is limited to 1800 watts, and that may not be enough for some to power everything. Also isn't it MOV based for surge protection? I think monster makes some good stuff, but I was only looking at the best protection and most (conditioned) current, for the very least dollars. I'm no expert, but I can vouch for the BW making a noticable difference by providing good clean power.