what are the top selling hearing aids?
['Eargo - Best Overall Hearing Aid.', 'Lively - Best Designed Hearing Aid.', 'Widex - Best Connectivity.', 'Signia - Best for Streaming.', 'ZipHearing - Most Affordable Hearing Aids.', 'MDHearingAid - Best BTC Hearing Aids.', 'Phonak - Best Rechargeable Batteries.', 'Starkey - Best for Tinnitus.']