Opinions on 5kW Sorensen SGA/SGI Series

[qwaarjet]

I'm looking at purchasing a 5kW (160V 31A) Sorensen SGI constant current supply. I've used Sorensen DHP and DLM  units in past and have no strong opinions on them. The DHPs don't have very good voltage stability at low voltages and the DLM tend to blow up( that may be my fault). Anyone used SGA/SGI in the wild or have experience with other high power constant current supplies.