A well designed ported sub will sound tight, flat and effortless. I built a pair and they sound amazing. The only benefit of a sealed sub is smaller enclosure and easier design/build if DIYed.

Ported can go much deeper, but it costs to go below 20 hz, and not all ported subs really play that deep. Read some reviews of whatever sub youre interested in before deciding,

I’ve used both and would recommend dual sealed subs over one or more ported. However, my preference is music (predominantly electronic, not that it matters) and movies is a secondary function for me. If I wanted pure un-controlled boom for movies then my preference would probably be ported.

Also, for movies, ‘port huffing’ doesn’t really matter. But, for music, on those long sub bass notes, the huffing can quickly become annoying.

Currently using a pair of SVS SB-1000s.

One factor that I haven’t seen mentioned here is that you can run some ported subs as sealed. I have an SVS PB-1000 pro that comes with port plugs and and a setting in the app to run in sealed mode. I run it plugged most of the time and do find it cleans up the bass tightness a bit for listenung to music. When I want to watch a movie or absolutely bump some low end heavy dance music, I take the plugs out. It’s probably a bit of a compromise in sealed mode compared to an actual sealed subwoofer but I find it works well for me.