how is the gps on the atrix? i came from and ipone 4 which had a great gps to the inspire which is not so good. google nav is great, but the gps seems to lose me for a few seconds every now and then. so im thinking of switching to the atrix, but i need a good gps as i use it every day. also, i need a good external speaker. never realized how much i use that to talk until i had the inspire which has a very bad external speaker. thanks in advance.