Garmin’s nuvi series has been all about constant innovation and improving on what just a few months ago seemd to be as top-of-the-line as the series could get. Hence, dozens of nuvi models and many with top 4.5- and 5-star ratings. The 7×5 series, which includes the 755T, 765T, 775T and 785T does it again, with the addition of some compelling “gotta have” features and smaller touches that continue to refine this excellent product without undermining its performance…