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Can anyone recommend a good strategy game where you have to build up resources then fight? The one that "looks" really good is Citadels, however it seemed to get horrible reviews. I like the idea behind the game but people say it freezes up, locks up, or just shuts down so I don't want to waste my time or money on it. It does look like what I'm looking for though.

http://www.metacritic.com/game/pc/citadels

Can anyone suggest something similar? I like the idea of having to collect things, build up an army sustain them and then fight with them. Would this be something like Age of Empires? If so, would you recommend Age of Empires II HD or III? I've read pros and cons of each version, they both seem good and bad in different ways.

I'm looking for something that's either old-timey, i.e. medieval up to WWII or even present day, I'm not really interested in futuristic stuff or fighting vs aliens stuff so I know I wouldn't enjoy the genre that is futuristic.

Thanks for any tips/suggestions.