Don't think that this will be an instant buy, really. Back to Medieval 2.
Glad I'm not the only one who thinks this way. Empire and Napoleon were just broken in my opinion. They need to take two steps back (to Medieval II) and then a step forward working from that. Working from Empire is a bad idea. We're getting awesome set pieces, and visuals and promises of deep diplomacy and real-time strategy, it all looks right, and should feel right, awesome, in fact... but it all just falls short of actually feeling complete.
Medieval II and Kingdoms have been on my system longer than any other game I've owned. I'll be watching the TW forums before parting with my cash, Empire sat on my shelf unplayed for almost a month after purchasing it because it simply would not run, and was bugged up the butt, to say nothing of the skewed easy difficulty and totally knackered diplomacy. Napoleon, I waited a few weeks after release before buying it, Shogun I'll avoid until I see it in a bargain bin.