Geoff, that's a valid point about DH, and the same applies to the EC products too. If your SOPs continue to treat it as a rad-alt 'bug' then it doesn't seem to cause a problem, but may do other operators. I'm equally bemused as to why the S-92 shouts "Altitude, Altitude" at you when you pass the Rad-alt height bug!
HC, you really must get your ex 76 pilots to get out more: what a crass response!
As has been stated above, and in more detail on another thread, V.24 EGPWS has ALL the functionality of an AVAD, plus a whole bunch of other goodies. A scan through the last few months worth of AAIB monthly bulletins will show how these 'extras' have saved huge embarrassment, or worse, for several FW crews (Do-328 and Dash-8 spring to mind with 'glideslope' and 'obstacle' warnings).
As for aural alert prioritisation, well, if you have an engine fire and failure on rotation, it REALLY isn't your day but, in any case, maybe Nr and height should be your primary concerns: not waiting for some woman to hold your hand and say "check height" or "One hundred", isn't that the PNF's job? At least you have the opportunity to pass those levels: some of us start below 100 ft in the first place!