Monitor? Or do you have one lying around? Tbh, with the cost of that build, I'd be dropping a bit on a nice monitor. If you're moving from a laptop, a good monitor, mouse and keyboard can all make/break a build.
As for your cooling question, if you're that worried about it, the case had good capability for more fans. It comes with 1 200mm, and 1 140mm, but it states the maximum is 8 120's, 7 140's or 2 200's. I'd wait until you have the case in hand, and see if you can add a few more 140's if you really want to.
If you're really looking for more cooling capability way in excess of what you need, water cooling is always an option. As always, I prefer fans for most gaming applications, as long as you're between 40-50 degrees Celsius you should be fine. Just make sure to pull it apart and clean out the entire rig every 6 months or so, and that case's fans should do the job. To give reference, my rig has:
1x 200mm Top-Mounted
2x120mm Front Mounted
1x140mm Side Mounted
1x120mm Rear Mounted