Welcome to the forums.
You're likely to find mint
condition 87s for sale so save a few pennies there.
The 1073 DPA is a good mic
amp. Again look used as they're pretty bombproof. The Avalon has a good mic amp but the
rest of the box is fairly grim. The faceplate is the best bit tbh.
gear choices I suspect you're doing R n B, urban etc? If so a used distressor is another
reliable bit of gear that would suit you well.
You can find used NS10s (they
don't make them any more as you may know). I'd be worried that if parts become
discontinued you might be stuck. You need a very good amp with plenty of juice with NS10s.
So you'd need to budget a few hundred quid for that at least. I'd consider Acoustic Energy
AE22s with a sub as an alternative. Similar idea. Up to date.
acoustic treatment...very very important. Crucial.
What DAW are you using?