Thanks guys.  I was half-expecting the answer to be that AIV is now standard, so I got that wrong.  As usual.  :roll: 
From my limited experience of AII humbuckers (Gibson 490Ts and 490Rs, basically) I find they tend to get a bit mushy with distortion.  That's not such a bad thing with a neck pickup, AFAIC, in fact I quite like it in some ways, but I don't think I'd ever choose an AII bridge pickup.
Anyhow, I'm 99% decided on a Black Dog for the bridge, so I want something sweet and singing to contrast with that midrangey growl.  I'm still thinking AIV SM might be a better match for the AV BD, but I'm not so sure now.  :?