Using the XV6800 as a Stand-Alone GPS

I'm tempted to replace my HTC XV6800. I've had it for a while now and although it still works fine, I'd like to have something that has more internal memory so that I can do more web browsing. If I get a new smartphone, perhaps I should use the XV6800 as a stand-alone GPS device in my car. The biggest downside of doing this is that the XV6800 isn't very fast at locking satellite signals when you compare it to other stand-alone GPS systems made by TomTom, Garmin, and Magellan. Also, the XV6800 has a relatively small screen compared to some of the newer GPS navigation systems. So, what will I do? Well, at this point, I'm not committed to replacing this phone, so I guess I'll just wait and see what else comes along.