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Before I answer your additional comment, one of the big advantages of a PC is that you can run a large TV monitor or multiple monitors which cost a lot less than a genuine PC monitor. Use 1920 x 1080 TV. Don't waste your money on a 4K unit. Use the 4K unit for your general TV watching. The reference I make below to Michael's videos at X-Force PC give a good indication of the use of TVs.
I don't know where you reside.
Before you buy, have a look at http://www.x-plane.com/kb/x-plane-11-system-requirements/
I understand that NVidia cards will give you the best performance.
If in the USA try X-Force PC, the recommended PC supplier by Laminar Research. Have a look at this https://xforcepc.com/english/flight-simulation/flight-simulation-computers.html Michael would be very helpful. He has some interesting videos on flight simulation and systems. The link is at https://www.youtube.com/user/col2mab/videos?sort=dd&view=0&shelf_id=0 He has provided useful info to me despite I don't live in the USA.
If in the UK try Wired2Fire. There link is at http://www.wired2fire.co.uk/flight-sim I understand they are very helpful and will discuss your needs.
If in Australia, particularly in Melbourne, try CentreCom at https://www.centrecom.com.au/centre-com-gaming Although I live some 600 Kms from this company I predominantly buy from them. An alternative company is PCCaseGear which can be found at https://www.pccasegear.com/category/1411/systems I have purchased from them as well.
If in New Zealand ( my guess is this is where you live) or somewhere else you would be best to try Dr Google.
Hope this additional information helps.
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