anyone have a top choice of PSU/recommendations, just read over on the Gridseed post a 30W saving on using a Platinum PSU over the supplied PSU!. Any advice appreciated.
It is a matter of cost vs efficiency. Assuming the miners take 60 watts, using 90 watts to run the miners is a 67% efficient PSU. If you use a 90% efficient PSU (platinum), then it would only take 67 watts. 90% efficient PSU will cost more than a 67% efficient PSU. What is it worth to you to save 23 watts? At 1/2 Kwh/day at 15 cents per kwh, that is $27 per year. A cheap PSU costs $20. A Platinum PSU costs $80.
I would go for a 80 plus gold psu, and get the lowest wattage you can while still leaving 20-25% of headroom. Those psu that come with a majority of the units are junk and inefficient. Atx power supplies are readily available anywhere and IMO are better because they at least have guidelines to adhere to (ATX v2.2 or 2.3). Plus they are way quieter than the brick PSUs.