I've been doing a little research into fuel flow monitoring myself. Looking forward, I'd like whatever I buy to be NMEA 2000 compatible. I already have one MFD that can display fuel information, and when my NMEA 2000 network is built out I'll be able to plug in others, or a laptop.
Much as I've always liked FloScan, I'm leaning toward a Maretron system. Two FFM110s at $395 each, and two pairs of sensors ($790/pair) for a total system cost of $2,370. It looks like a simpler system to install, no dampeners.
I'll probably call FloScan and see if they can match this; I'm struggling to find their prices on line for a complete system for twin diesels. Best I can come up with is a pair of "cruisemaster" systems ($700 each), which include a monitor/gauge and a pair of sensors. But if I'm reading this correctly, I'd still need a pair of FloNet interface hubs ($1,200 each) to get NMEA 2000 out. Not sure I even want the gauges, but it looks like that's what the sensors talk to. I'd be more interested in their dual tach in a single gauge, but I don't think it has the "smarts" to read the sensors.