F700BT with update applied. I've had it for about 6 months when it started rebooting this week. I deleted the GPS files and so far (20 minutes of drive time) its looking all better. I am very relieved that I don't have to send the thing back to 1925 E. Dominguez St. Long Beach, CA again. Thanks everyone!
UPDATE: the problem is back today. It happened while I was making a call on a phone I had hooked up via bluetooth.