This is one of my favorite TV shows ever. I hope that we will see the entire series released after these discs. I highly recommend these two new DVD releases to both fans and newcomers.
To newcomers, this is not some campy old show. It stands up quite well with shows today. The voice acting is solid and features the guy from "Law & Order" in one of the lead roles. Unlike a lot of shows at the time, and even now, the heroes do not face the same old villain every week. But there is continuity so sometimes villains will return or even team-up. There are plenty of returning supporting characters that you will get to know over the course of the series, too. This is science fiction on the frontier (or "Sci-fi Western", if you will). Even though it's a very American show, the animation is Japanese as well as using some nice computer graphics mixed in. Again, I highly recommend it. If you're still not convinced, I recommend getting Supertroopers first. It will sell you on the other one so you're better off going for both to get free shipping!
As for fans of the show, I doubt you need any coaxing from me to order these discs. Here's one, though: it looks like the episodes on these two new DVD's (Supertroopers and Tortuna) are all different episodes than what's been released on disc before (ie, the single laserdisc release or the UK DVD). I've read that the following episodes will be on the new releases:
Tortuna: "Tortuna," "One Million Emotions," "Scarecrow," and "Heart of Tarkon."
Supertroopers: "Supertroopers," "Galaxy Stranger," "Shoot Out," and "Battle of the Bandits."
The laserdisc: "Tower of Combat," "Changeling," "Lord of the Sands," "Trouble at Texton," and "Rogue Arm."
And the UK DVD (region 0): "Phoenix" and "New Frontier."