I have a mission you may really like. Its Sorti Rising and is for Fed 31+. Its a very long mission with lots of dialouge. However, quite a few people who have played it think it's got that grand trek-epiode feel to it. Check it out if you want.
I would like to throw my missions your way for you to check out. They are Deep Space 11, and the following series, The Jem'hadar Alliance (consists of 6 Episodes). I've gotten a lot of great feedback on these missions and people have really enjoyed them!
One mission I tried and loved was called 'Search for the Kitty Hawk Part 1', or at least I believe that was the title, not on my STO computer so cant say for certain, if you type in kitty to the search box it comes up.
Like I said its a great mission, one I can fully recommend and I didnt see it on the list.