Yes i want to know this too cuz i'm about to get a new mvb and i heard its the best one. Then i saw the old thread about the possible eye issues it may cause. So i'm not sure which is good now?
I consider the PowerSun to be a middle of the road bulb. There are worse (the Nat Geo bulb comes to mind) but there are much better (MegaRay and Arcadia).