Yes, ñ or ç would be good. Beware of ' and ` though: they are used in
Normal mode for "mark" movements.
Yes, but both keys do the same, so I'm on the safe side if I choose
only one of them, am I wrong?
They do similar, but not identical actions. The regular
tick/apostrophe jumps to the beginning of the marked line, and
the back-tick jumps to the character position where the mark was
dropped.
Granted, I tend to use back-tick almost exclusively, so I suppose
the forward-tick could be available for use.
-tim