My Seasonic X-660 KM has had to back for inspection for a possible fault and I may end up getting a replacement. The direct replacement for the 660 KM is the X-650 KM3 as the 660 KM is end of line now. I have the choice on any PSU. While reading Johnny Guru's review on the X-650 KM3 I checked out the Corsair RM650i review as well as I know Corsair has some quality units too. It seems that the Corsair RMi series are right up there with the Seasonics right now. Any opinions on what would be the better unit at the end of day or are these two pretty much tied?