[Joker]

I would recommend looking at some retailers for a pre-built computer, since the shortage makes it very hard to buy parts like the GPU on its own.. a lot of people don't like the pre-built computers but they have improved a lot in the past 5 years

Well I plan on buying a pre built and then just changing out the parts as I see fit like if I needed a stronger cpu/gpu etc

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Yes i'd recommend a PC. Getting a mac isn't ideal for gmod.

In all seriousness, it depends on what you are using it for. For gaming make sure your graphics card has good vram, etc.

Well even with a mac I think I could still beat you in a gunfight :^)
 Mainly gaming would be the purpose of it I plan on switching out the parts as I'd wanna upgrade it. I think the price range I put is a decent starting point for the parts that would be in it.