I was in the same boat with people 2 years ago saying that Rosewell PSU's are crap. I bought a rx 900 watt and a rx 750 watt around 2 and half years ago. I went with them based off of Johny gurus review of them, which was very good. I have used these two PSU's non stop for the last 2+ years, never had a problem. I run two 4870's in crossfire, two drives in raid 0, a shift tech water pump and a phenom II 940 be @3.6 ghz 24/7.
If I am not mistaken didn't Johny's do a review of the kingwins? I was under the impression that they were not so good with how the performed when tested by Johny guru.