While the Black Burndy vs the Grey ones were discernibly better, , they were less so then then the gray to the black Snaics, at maybe 1/5 or 1/10 the outlay. In other words....do not replace your grey Burndies until you have replaced your grey Snaics. Black Snaics give a more dynamic, crisper, more tuneful and less background noise then the grey counterparts. The black Burndies give a rounder and marginally less brittle presentation then their grey counterparts, but does not offer the same game changing upgrade. With the exception of the Blacki CDS1 Burndy (which is a mammoth upgrade over the grey one), do the black Snaics before swapping grey Burndies for Black ones.