Thought I’d chime in on this thread with my antidotes.
Used the Newton Channel on my last three albums as a vocal preamp/strip.
The first album I used it with a 635a, next u87ai, and finally a MD441.
Favorites in this order
MD441
635ab
U87ai
I sold the MD441, U87ai and the Newton within the last month.
Why? Because the Newton was total overkill IMO. I didn’t find the blue/red to do much, didn’t care much for the compressor and the EQ was alright.
I think the U87ai sounds the best with clean preamps and hated it with the Neve Newton. It sounded too cold to me.
Why did I sell the MD441 you’re probably wondering. Because I hated the moving coil I could hear on the vocals. It’s a beautiful lovely balanced microphone and sounds x2 better than a U87ai IMO. But damn does that moving coil get to me. Paired with the Newton I found it excellent.
Debating on selling the 635ab and looking for a new mic/pre setup for my new album. Variety is the spice of life and without spending time with these I could never know where they are at in relation to one another.
I have a very shrill vocal style and looking at the KU5a but open to ideas if anyone would like to give a recommendation.