I have to admit that I probably use the newer
SJ50 a little more than I ever used the
Metal Lead V (though both are based on the 5150, of course). I wouldn't mind at all if the
Vintage Metal Lead got an update, though. The manual says, somewhat cryptically, that it is based on a Marshall "JMP100"; I suspect this implies what Marshall sold in the late '70s as the "Marshall Master Model 100w Lead #2203", which is sort of the "missing link" between the non-master-volume "plexis" and the later JCM800s (i.e., the
Brit8000 in AmpliTube).
You might also want to check out the
Satch VM, which is based on the Marshall JVM410HJS (i.e., the Joe Satriani signature version of the JVM410). It's quite a "Swiss Army knife" of Marshalls, with a variety of interesting tones in multiple channels; the Crunch channel's Red mode is (according to the original Marshall manual) intended to provide a "modded JCM800 sound that so defined the '80s era".
I should confess that I'm not actually a real Satriani fan myself, but the gear models in his collection are brilliant for this kind of thing. There's also the
Boston 100, which models the Rockman X100, and is just "none more '80s".