Along similar lines, it may be important to match the brand of your multifunction display to the brand of your N2K sensors and instruments so you can easily update all their firmware. Download the update to your home or office PC, copy it to a memory card, then stick the card into the display and, voila, the multifunction display and any familial device on the network can get new features (or fixes for bugs). Simple sensors and such dedicated displays as wind needles rarely need or get updating, but the new all-in-one instruments are quite a different story.
The Garmin GMI 10, for instance, could barely display a faux wind gauge when it first came out last year, but now it has the most feature-rich wind screens of the lot. It can chart multiple wind data points, its user-defined closehauled dial can automatically become a downwind dial when you bear off, and its interface makes it pie simple to customize these and other screens or, say, choose between water (paddle) speed or ground (GPS) speed for True Wind calculations; it can even pick which of five wind sensors you want it to listen to. I'm aware that the latter situation isn't the usual (then again, so were my harbor mates, though that's a tale for another day), but some belt-and-suspenders cruisers like the idea of redundant sensors, and they'll be pleased to find their choices clearly listed by brand and model names.