If you are talking about the best drive currently available from each manufacturer, the order I would put those three in is:
Yamaha, Plextor, and much further down, Sony.
Yamaha has produced some greater CD-RWs after the 16X.
Plextor always produces good drives.
Sony - well, IMO, Sony sucks - I would get Lite-On, or LG, or just about anybody else over Sony.