What computer should I buy? I'm unsure what to get?

I want a prebuilt computer around the $1000 mark that's upgradable with an ssd. I'll be using it almost solely for gaming. I don't know much about computers, I just want to play some games on my free time. I want to play at high resolutions with no lag. Some of the games that i play are: garrysmod, vindictus, metal gear solid 5, warframe, dota 2, day z, minecraft, team fortress 2, and pretty much any other game you can think of. If I'm asking for too much in a computer tell me and I can compromise. Anything is appreciated!

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