Not sure about the size, but Northstar gps's are the BEST out there and the most reliable, better then anything out there. Their radar's have gotten much better and can compete with most out there and their fish finders are quality. I would go with northstar over raymarine without thinking twice. I work for a large boat builder and a friend works for a company installing electronics on the boats, most boats leave with Furuno gearand a northstar GPS, a decent number have all northstar gear and far less with furuno. the other brand we see a bit if Simrad, but they are very pricey for what you get IMHO but have great sounders. If I redo the electronics on my 265 Express I'm going with a Furuno FF seperate from everything else, and then a Radar GPS combo from Furuno, with a transom transducer as my back up, and then a Northstar GPS as my main GPS. I do not run radar all the time, so when I do I would run my GPS and radar togeather with overlay. Just my 2 cents but that seems to be how the Big boys rig their boats.