We are very lucky to have so many good cannister filters (and HOB
's) compared to years ago. Fluval and Eheim are well known and been doing the filter thing a long time. One important thing to look for is the reputation for good customer support for questions and if you do have any trouble. Let's face it. Good filters ain't cheap so you want a company that will stand by you.
Now, if we could just get all the junky, worthless, falsely claimed lighting fixtures run off and some good ones with accurate, standard PAR/PUR information.
LOL, here, someone else can have the soapbox now. Later, OS.