thx so much for your advice. Yes, you're right. I still looking for my best garmin gps. I still love my 1490LMT vs 3790LMT somehow. I need mp3 player because my microphone in the car is broken. Then I intend to use Garmin as my gps, phone device and music player at the same time. Thing is 1490, the sound too bad compares to car's sound system. If 1490 can play mp3, then I can use car sound system with garmin via bluetooth.
If anyone of you have any more advice, I really appreciate about this.