Hi Zoot
It really helps when you ask for advice to post full information about your system on your personal profile.
Opinion divides on the Urika/Radikal v Superline/SuperCap comparison. There was a long thread on here a few years ago when a few on the forum went to Cymbiosis for a comparison. I seem to remember Fangoss Flyer (Richard) was one of them. I think the conclusion was that they were extremely close and both excellent - choice was very much down to subjective preference.
I briefly had a SuperLine run off a 282 but I had problems with RF interference and that plus a shortage of space led me to trade in the SuperLine for the Urika (I already had a Radikal power supply). But I haven't heard a properly set up SuperLine with SuperCap in my current system.
Clive