I bought an IOTA DLS-55 w/quick charge plug in, used, about a year ago for $75 to power my HF rig. It had no RF noise and a very clean output. Last week, it quit working. I bit the bullet and bought an Astron RS-50A power supply from HRO. It arrived in a huge box weighing 50 pounds. I rigged up a 10 gauge power wire with Anderson power poles, grounded the chassis, plugged her up and turned her on. Silence. I'm not used to power supplies that don't make any fan noise. But, work she does and very well. My only concern is how warm that huge supply gets. I should put it under my desk to keep my feet warm, lol.
I bought the Astron on the good reputation of the name. After reading the reviews, some Hams don't care for it too much - they either love it or hate it, not too much in between. As an aside, the RS-50M with the meters, gets great reviews!? Go figure...
I'm powering my 2 meter rig with a Pyramid PSV-300 which I bought new before I read any reviews about it. It has a little fan which comes on every now and again, you can hear it but its not annoying. It also has clean DC and performs very well for my Yaesu FT-2900.