Computer Recommendation for Steam Games

TCDStudent1

Budget:

 800 would be max

Intended use:

Steam Games. Games would be old games that I played years ago that I'd like to play again. Age of Empires, Commandos, Caesear 3.

Mobility:

Mobility not an issue. I'd even consider an old desktop with a disc drive as I still have the games on disc. But I am guessing Steam is probably the way to go now.

Warranty:

Not that important.

What Operating System do you use?

I use both. Windows for work, Mac at home. But looking on the aforementioned games on Steam, they require Windows.

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Any recommendations greatly appreciated.