I often find myself wanting to make a polite-but-informal suggestion like the English "Shall we meet tomorrow?", and not knowing whether to say "Wollen wir uns morgen treffen?" or "Sollen wir uns morgen treffen?".
- Are both technically correct?
- Is one considered more natural in this context/register?
- Is there a better third option?
(Note that I'm not trying to say "Should we meet tomorrow?", in the sense of "Is it appropriate for us to meet tomorrow?", nor am I trying to make an assertion like "Let's meet tomorrow."; I'm asking expecting a yes or no answer.)