"Professional juries" is essentially an oxymoron. The basic idea of the jury system is that people who judge your guilt are your fellow citizens, not government functionaries. (Whether this is good or bad by whatever metric is beside the point.)

Besides, in common law jurisdictions, you can typically waive your right to be tried by a jury and have a bench trial, where the judge is responsible for findings of fact as well as law. So basically, you already have the option to be tried by a "professional juror."