I did the electronics upgrade this off-season and given the space available I opted for Raymarine as I could fit a pair of 12" MFDs; I liked the Garmin units but the height was going to be a challenge. I went with one Axiom Pro as the primary and one regular Axiom as a repeater. The Pro model comes with two built in sonar drivers so no black boxes needed, a 600W matched to their 3D transducer and a 1kW that I have driving an Airmar dual band CHIRP, both are transom mounts on my boat but there are in-hull and thru-hull options. Given the depths I fish on the east cost I went with Airmar's TM275LHW low/high wide which brings a constant 25 degree beam width; it limits depth to 600' but more than doubles the area being looked at, the low band will supposedly reach 3K feet. Given the stay at home order I've not yet splashed the boat to actually try the sonars but am excited at the prospects of coverage here in the Chesapeake and the near-shore waters of the mid-Atlantic. The NMEA standards are such that I think most components will work well enough across brands but full interface functionality will likely require you to stick with one manufacturer who designed their units to work together from the start.