After Xmas im going to have 3 Xbox Ones and a PS4 in my house. Need a router that can handle this. 2 of the Xboxes are upstairs, so It needs to have great WiFi range and be able to handle tons if devices. Recommendations? My current router can barely get WiFi upstairs.  One Xbox and the PS4 are wired with an ethernet cable downstairs,  other 2 will be upstairs in kids rooms. 

  I also have a laptop that is my only computer and it doesnt have a disc drive, will this be a problem for installing router? 

Looking for recommendations from people with similar setups.  I know next to nothing about this stuff so help is greatly appreciated,  Thanks! 