I absolutely love EUIV, but I wouldn't get it here. The game is so much better with DLC, but there's just so many that it doesn't make sense to jump in right now. I guess it's fine to give it a shot, but there's a subscription on Steam that gets you all DLC for a monthly cost, which is going to be a much better deal than buying them individually here.
Basically, if you like history and map painting games, EUIV has a lot to offer. I don't recommend buying DLC at this point, but I do recommend getting the DLC with the subscription.