Just ordered R1 from Sams Club, and it occurred (as usual after I ordered) to me that this model is getting long in the tooth. How much longer is it expected that Uniden will support with updated firmware? Is there a version preference when I do the update? Seems like general opinions are decent of most recent, 1.53, but I'll be counting on the RD during a long road trip soon and wont have too much time to get comfortable with it or to play with versions. Thanks for the help!