[lomaserena]

Any of the instruments mentioned, in good repair, will do what you need. The main problem for beginning doublers is the difference in resistance between the typical sax mouthpiece and the typical clarinet mouthpiece. Try to find a free-blowing clarinet mouthpiece. Mouthpieces that are recommended as good for klezmer or jazz are a good place to start. You can still get a good classical sound on the best ones.