Looking for best gaming PC with big budget

I'm looking to try and have a nice 4K or 1440p gaming set up on a laptop. Was thinking desktop but I ain't really sure it'd fit in my room set up.

Was originally told to go with a Sager model since it had the most upgrade options apparently from Xotic, but from talking to another consultant it'll be completely incompatible with any newer upgrades.

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General Questions

1) What is your budget?

About the range of $4,000

2) What size notebook would you...

Looking for best gaming PC with big budget

Looking for best gaming PC with big budget