SC II was the only RTS game I ever played much of. I do worry about the upgrade requirements though... and the main reason I enjoyed it so much was that it was the first game I ever played in my res-net while away on exchange in university... and now I'm much closer to the having kids point in my life... so the RTS experience doesn't seem like something I'll be up for as much anymore.
And the Civ series has taken up WAY WAY more of my time in the grand scheme of things, and is just a better fit for me.
But thanks for the OP, its interesting to see this finally on the horizon - its been a LONG time.