So late to the thread, but yes, I have a 60:60 stone. LOADS of white light return. For a short while it did have fire (rainbow flashes) but that was in an in between setting where it set up really high. It's new setting is higher than my original, but not as high as the in between setting and it no longer has the fire it did. From this experience I learned, that with my diamond anyway, it has to be set high enough to CLEARLY be able to see the diamonds culet from the side view in the setting for it to have fire.
I'd re-set it higher, but there is NO way I'm going through that hassle again just for some fire. It still has fire in stores and homes/restaurants with recessed or can lighting. Just no fire in sunlight or regular indoor lighting. Just sparkly brilliance.