I daytrade and I wouldn't put quad monitors on one system. Dual monitors on 2 systems with a reserve PC under the desk just in case an OS carsh, hard drive crash, or PSU dies.
If you use one system and have all four screens on it and that system hangs or freezes right before you pull the trigger... get the picture?
Have a backup alongside with two screens so you can jump right and finish the trade. Hope you find this helpful. Good luck with your puts/calls/naked shorting.