Thanks for the reply.  I'm actually in a multiplayer game of Stellaris at the moment with someone and we're in the late game and it has become an unwieldy mess.  I was hoping to find something more streamlined for us but no less deep and GC3 caught my attention.  I played GC1 & 2 SP (don't have GC3) but I'm a bit skeptical of turn-based games as MP but I saw someone playing it on a video and it seemed to work fine.  I just wanted to get some views about people's experience with playing it.