Welcome, mxd.
*marks down another soul claimed*
You certainly won't be disappointed with Dom3. And once you exhaust the base game (yeah, right, haven't gotten around to playing half the nations myself), there is a glorious profusion of mods, though methinks quite a few are going to get an overhaul after we get more mod commands for different things in the next patch.
You will also find quite a bit of community support and nifty little tools, like the stuff linked from Ballbarian's sigand mine. Have fun!