Suggestions (expanding) below are solely made depending on our own side-tracked tastes… Berlin’s a wonderful host for those.

These promoters get the greatest new music into town:
→ AmStart Concerts
→ M.Soundtrack concerts

These festivals do that, too:
→ Goldmund Festival
→ Berlin Festival
→ A Maze Festival (games & music)

Recommended record stores:
→ Corconium.de listing