Best "monitor" for price? With Miracast?

[FlyByBill]

Hi folks . I'm hunting for a good dedicated phone/monitor for my MPP .
Considerations are:

1. Brightness
2. Cost
3. Miracast output (sooo mad they disabled it on my Z2 Force - effing Lenovo) . Willing to buy and root a phone to re-enable this . Want to stream to a Vufine via Screenbeam mini 2 .

Thanks!

 

[Ram85]

I've got the Feelworld FW279 Ultra Bright 2200 nits screen and an Nvidia Shield K1 tablet (has HDMI out). the screen is incredibly bright. I've heard that the Miracast G4 also works great.