A:Answer Yes it does come with a nice keyboard it's not wireless but it's what true gamers like. The mouse is awesome, both keyboard and mouse light up. As for the monitor first it depends on the size that you want, in the 27inch range there are multiple monitors that would be nice for gaming. You have to do the research, AOC, Asus, LG and many others.
I myself am waiting for a 32 inch model with 2.1 which should be coming out next year, ASUS, You will be able to used that monitor with PC, Play station 5 and Xbox series 1 at 120 Htz. The card on this computer supports multiple monitor and is a nicely built machine. The packaging is some of the best I've seen.