I've had a Sigmas Evo 3 and PSA P10 side by side. In my system, with the components I had then, the multiwave adjustments on the P10 created various levels of hum on most settings. I bought the Evo 3.
Today, if I had it to do over again, with products that have subsequently come on to the market, I'd almost certainly buy the Inakustik 3500. Though I'd be tempted to audition the Lab 12 Gordian first.