I have a couple M160s and I'd certainly recommend them for instruments. Not so much for vocals though. That's why I suggested an M260 which works better on vocals. For $1000 US, you do have some options, however, including picking up both an M160 and a vocal mic. If I was looking for ribbons with your budget, I'd probably get an M160 and an M500. The M160 is a double ribbon. The M500 (now discontinued) was designed as a performing vocal mic and is a single ribbon. It has a bit of a presence peak so it's a bit brighter than the garden variety ribbon, but not near as bright as many other newer vocal mics. A very, very nice mic on many voices IMHO. Used M500s seem fairly plentiful (I have 4 or 5 of them - haven't counted lately) and should be pretty available in the UK. A used M500 typically goes for @$300 or so (although I've picked them up for less than $200 from time to time). What kind of voice do you have? Soprano, alto?
There are, of course, lots of decent vocal mics out there that would fit within your budget, especially if you can buy used. Frankly, the vocal mic that gets used the most out of my collection is the Shure SM7. Ugly and relatively cheap, but as a dynamic mic, it sounds great on most voices and is very forgiving of mediocre rooms. I'm now up to owning three of them because they get used so much. Worth considering. A new one can be had in the States for @$330 or so.
I have an AEA R84 as well, and while it can be quite good on certain instruments and voices, I'm not sure that it is what you want. It is not designed for close micing. It's best 12-18" (or more) from the sound source. I use it on cabs, horns and background vocals where it is great. It wouldn't be my first choice for acoustic guitar or "lead" vocals.
I think
the Beyer MC930 would be a very nice SD mic for instruments (I'm contemplating getting a pair myself) precisely because they seem to be flatter than many of the newer SDs that are a bit hyped. I understand that they approach the sound of the Neumann KM84i (not the KM184 which is fairly bright IMHO) in that regard. While I haven't heard the Beyers, I do have a Neumann KM84i and I'd certainly take a pair of those if the price wasn't so prohibitive. You could certainly put together a very nice rig with the Beyer MC930 for your guitar and a Shure SM7 (or other vocal mic) for vocals withing your budget.