Assume you want to run Fortnite Chapter 2 but unsure what screen resolution you want. Anyway here's an estimate:

https://www.game-debate.com/games/index.php?g_id=36572&game=Fortnite%3A+Chapter+2&p_make=AMD&p_deriv=Ryzen+5+3600+6-Core+3.6GHz&gc_make=ATI&gc_deriv=Radeon+RX+5700+XT+Gigabyte+Gaming+OC+8GB&ram=8&screenRes_width_FPS=1920&screenRes_height_FPS=1080&checkSubmit=&processor%5B%5D=307&grafcard%5B%5D=781&ram_totalMem=4&game%5B%5D=36572#systemRequirements

81 FPS 4k Ultra

137 FPS Ultra 1440p

179 FPS 1080p

chevrolux: I wouldn't spend that much on a PC and not get an RTX graphics card.

Building a PC is really quite simple these days. Consider Ryzen 3000 series, and RTX graphics.

looking at this one as well https://www.computerlounge.co.nz/shop/ready-to-ship/trooper-gaming-pc thoughts?

game-debate.com estimates a few more fps:

83 FPS 4k Ultra

139 FPS Ultra 1440p

183 FPS 1080p

chevrolux: I wouldn't spend that much on a PC and not get an RTX graphics card.

Building a PC is really quite simple these days. Consider Ryzen 3000 series, and RTX graphics.

Simple, yes, but it also doesn't cost much more (or in this case, seems to be it's a wash) to get it pre-built, and you get a 2 year RTB warranty on the Computer Lounge pre-builts, plus they stress test everything before hand.

Unless you actually enjoy the tinkering as much as using the final product, or you want specific components, I would say stick to pre-built. And I say that as someone who takes any excuse to custom build something.

If you are basing this on Fortnite, I would go for the the second one. While in some games the new AMD 5700 cards will clean up, it seems anything running Unreal Engine 4 suffers pretty badly for now. The motherboard seems to be quite a bit better as well.