Deep Space 9 complete series box set. I'm on season 3.
I was a bit hesitant before starting my rewatch. It's been ages since I watched any Trek and characterisation on tv shows these days tends to be somewhat gritter, if that's the right word, so I was a bit concerned that I would struggle to get back into Trek-mode again. Thankfully it's not been a problem and I'm enjoying it as much as ever.
Oh and I love the new box set, looks good and such a space saver.