The GTX 1080 is going to be overkill for 5 boxing and for gaming at 1080p. I use the 1070 on a 4k monitor and it only hits ~60% when I'm 5 boxing WoW. The CPU cooler in the picture looks like the stock Intel one, which is usually pretty crappy. The fan looks pretty small too which means it'll be loud. 2400mhz RAM is pretty slow for that kind of price. Found the same one on Newegg (an open box one so it's cheaper):

https://www.newegg.com/Product/Produ...354R-_-Product

A 500W power supply means you won't be doing any crazy upgrades without replacing it. Hard drive/SSD space is pretty standard for a pre-built PC, but still on the low end considering you can pick up a 3TB HDD for less than $100.

Overall, this will work fine for pretty much any type of gaming. I guess for someone who's been building their own PC's for so long it would be a hard sell for me personally. I'd probably grab the open box version from Newegg for $300 less and then use the money saved to tweak the PC a little. I'd swap that crappy stock CPU cooler out for a low-profile after market one like the Reeven Steropes. It'll be far quieter and you'd actually be able to overclock the 7700K.

I'd actually recommend you go to an online PC builder. You'll get a much better value with them. I went on iBuyPower.com and built the same system you linked from Amazon, only with better RAM, a better CPU cooler by default, and better internal components overall for the same price:

https://www.ibuypower.com/Store/Inte...rator/W/394826

Also found a PC Gamer article that reviews nine different online builders and compares prices:

http://www.pcgamer.com/nine-custom-p...the-best-deal/