At a certain level of advanced playing, it makes a lot more sense to have an instrument made to suit your particular physique, musical tastes and requirements.  It is also less time consuming and more economical than spending possibly years hunting down a possibly overpriced antique instrument to which you will still have to adapt.

You will never develop your own individuality by adapting your technique to an instrument which only approximates to your needs.  An ideal instrument will not just suit your requirements to a tee, it will exceed them and assist you to become a better musician.