Her death was underwhelming compared to what they were planning. In the book Star Trek: Action they detailed how the story for TOTP was fleshed out and the original plan was for Dukat to lead a raid on the station with the Jem'Hadar, disable it, steal an orb and fly off into the wormhole where Jadzia would follow him and get herself killed trying to stop him collapsing it. By the time that Sisko/Worf and the rest arrived back to the station it would be heavily damaged and the promenade would be in flames. But they didn't have the budget to pull it off, and they thought that having two battles happening at the same time might negate the emotional impact of the death, so instead they went with what's in the final episode. Anyways, none of those episodes stands out as brilliant to me, but I'd probably go for DS9. B5 was okay but it wasn't thrilling, Voyager was too over-the-top for my taste, while DS9 wasn't a classic but at its heart was an interesting story.