I have a networked Furuno Blackbox VX2 system. I have used a standard 19" Acer 300cmd brightness monitor on my FB for almost 6 years now. It has a matte screen, is mounted on a very adjustable RAM mount. It folds down into a custom compartment where the electronics are mounted, and gets some "shade" courtesy of a polarized tinted hatch that covers that compartment when closed and shades the screen some when open. By adjusting it as noted above, I can see it just fine from the helm seat 99% of the time. Here's a not very good picture, this can be swiveled 90 degrees+ to face the helm, works great:
I need to replace it sometime as I spilled a Coke on it a few years ago and a black spot has expanded across a non-vital area of the screen. Only about $150, if that, though I am tempted to get a 19" marinized "pilot house' monitor from Comark, also 300 nits, which goes for $1000. According to them a lot of their commercial customers use them on exposed decks.
The modern glossy screens, such as that on my MacBook Pro, are virtually worthless up there on a sunny day, even with a cave around them. You can get a 3M anti glare film product which helps.
Just FYI since i have that album open here is what the lower helm looks like, three Acer 17" monitors, from left to right one for the upstairs Furuno, one for a computer to hook into, one for the downstairs Furuno. Great set up that allows full screen radar on one screen and full screen plotter on another, wonderful to have when running purely on instruments.