[Spellman]

If you specifically want more Total Annihilation style RTS games, Ashes of the Singularity scratches a similar itch. And of course Planetary Annihilation does TA IN SPACE with the ability to sling asteroids at your opponents. Personally switching to a 3D sphere world broke my brain.

[pdntspa]

I didn't like Ashes of the Singularity, I really don't like the capture point game mode that it seemed to revolve around (though Dawn of War did the same thing and that didn't bother me...)

Planetary Annihilation is cool too but I really didn't like the spherical maps

SupCom really is the sweet spot