Are you nuts, Freespace was awesome! Though I never got around to playing Freespace II, I'm sorry I didn't.
If you didn't like Freespace you won't like Star Wraith much better. Especially the ones before Star Wraith III. I only played the demo to Star Wraith III, but I still liked it.
Other than that, there was an interesting game called Renegade. I tried to play it on my old PC, but the BIOS drivers needed to run the game weren't available.
Terminal Velocity may not be outter-space, but I though it was good fun. 3D Realms should release a Windows version of it so that it can run again
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Hmmm... Have you tried Wing Commander Prophecy. I never played it but it is much more recent.
I'm not really sure... of wait, you could just make your own ideal Space Combat Sim in DarkBasic. The only problem is comming up with original ideals.
Somehow I've got a major brain-fart. I know there are more Space Combat sims than the ones I mentioned, but I can't seem to think of them. I think you're best bet is to look into Wing Commander Prophecy.
"Power, precision, and don't forget about speed. If you practice everyday with these things in mind... you begin to develope A FIGHTING MODE." - Fist of Legend (Jet Li)