Having been on the list of things to add to the studio equipment list I have finally ordered the Neumann TLM 102 microphone.
This will be my go to microphone for vocals, primarily, but will be an extremely useful addition to the set up for many other applications. The Rode NT1 has served very well over the years and I'll retain this as a secondary microphone when needed. The next major purchase will be an upgrade to my studio monitors most likely a pair of Adam A7X or perhaps the A5X.
