I highly recommend you actually do buy this game when it goes on sale in the summer. It's a fantastic strategy game, with deceptively simple gameplay hiding a much much more intricate framework.
On the surface, it might look like all I'm doing is moving armies around, but in reality I'm doing far far more than that - there's an entire mechanic based around your army and how many men you can afford to have in it, along with the risk of running low on manpower during a series of conflicts. There's a very complex trade system (OK, not that complex, but if you don't know what you're doing you will fuck up with it) a diplomatic menu I've barely scratched the surface of, and a multitude of nations that I haven't even touched.
For forty dollars, this game gives a load of content.