well, I had a Strymon and it was top-notch. I had three MXRs (one ISO brick and two mini-ISO bricks) and all had or developed a hardware problem, so when my only left dies, I'll probably get an Ojai again. in your case that'd be probably Zuma (or two Ojays, they're stackable with a 20V cable).
I also had good experience with Pedaltrain Spark, but only 5 outputs and discontinued.
the reason I didn't try Cioks/Eventide yet is that here they're more expensive than Strymons, but I've heard they're very good. and not really fond of non-standard power cables (on the power brick's end it's not a 2.1mm jack, it's a RCA connector).
an isolated power supply is not an overkill, it definitely improves things IME.