You've got the best kit, but you want to be able to see things, so you need the best screen. You'll need to find a display to use regardless of whether or not you got the Pi 4 or 400. We've put together a list of the best options for your mini computer.
The next step is to get a great screen after you've picked up a good kit. When it comes to video, theRaspberry Pi is up there with the best. The current model has the power to drive any screen. While you're at home, you can use a larger monitor or television, but for something more portable, we prefer the GeeekPi 7-inchRaspberry Pi display. You'll love it if you need a small display for your Pi and don't want to carry a high-power charge to run it.
The VP28UQG is a device that will allow those wanting to push the limits of their pi to do so. The display has up to a 4K/UHD resolution, two HDMI ports, and a single DisplayPort, along with ASUS' Eye Care Technology to keep your eyes from getting too strained when you're staring at the screen for too long. If you want to hook it up to your PC with the built-in freesync support, this is the one for you.