The headset has a monitor. Whether or not you want a monitor depends on you.
If by 3D, you mean the cinematic 3D we get with the 3D Glasses, you cant really do that, for that you need specialized light projectors. 3D is not simply a 360 degree screen like VR. 3D Images use light at different speeds to stimulate an image. Well, atleast if you mean that with 3D.
VR is better, and will give you a great experience too.