I think Garmin is good. easy to use, fast calculation, and reliable. and yes the OEM is holy crap. the price range of Garmin $100~200. if you do not like messy wire. you can charge it and use it without wire or you can purchase a pad which hold the navi in tight on your dashboard. And you should know that X5's power jack is "always on" type. so you need to unplug it when you park your car, the navi will not turn off automatically.