Thanks for all the good suggestions. Looks like I've got a little homework to do here, but fun homework.
I need at least four outlets and don't want to pay for another power strip to expand capacity, which somewhat rules out the Shunyata and Audience options at this point given my budget. The Brickwall unit probably has the best surge protection but has a series filter that I'm concerned may limit the performance of my amp, but I'm not sure about that. Still looking into the others.
Any other thoughts greatly appreciated.