I second mikealder--the hx4700 is great. Besides the screen's size, it's especially bright, making it much better than anything else I've seen for use outdoors or in a car. It's also got a little light-level detector and automatic dimming (so it won't blind you in the car at night). It's quite solid and reliable.
I recommend a bluetooth GPS with the SiRF III chipset--you'll spend less time waiting to get a signal and see less bouncing around on screen when you're in areas where the signal might be affected by nearby tall buildings. Plus, if you get one with a built-in datalogger, you can carry it even when you're not using the PDA and record where you've been to do things like geotag your digital photos. Finally, vs. the ones that fit in the CF slot, it's a lot easier to carry the iPAQ in a protective case in one pocket and the GPS in another than to carry one big ungainly combo that doesn't fit in a protective case and is too fragile to even think abot putting in a pocket.
The one weakness of the hx4700 is in the switch that detects whether the battery door is open. It only affects you when changing the battery, which is something that 95% of users never do (if your iPAQ has this problem, you have to use the built-in backup program to make a backup before changing the battery, then restore from that backup afterwards--so you can still change the battery without losing anything, but it takes five minutes instead of 30 seconds). To see if an iPAQ has this problem, when it's fully charged, turn it off. Wait 10 seconds or so. Slide the battery cover lock switch to the unlocked position, then wait another couple of seconds. Now remove the battery for a few seconds, then put it back. Slide the battery cover lock switch to the locked position. Push the power button. If the switch worked, you'll get a blue screen as the iPAQ reboots, and after 30 seconds or so you'll be at the normal today screen (if the switch is still working after all this time, it'll probably keep working--seems to be a matter of either getting a good one or a bad one from the factory, not of wearing out over time). If the switch didn't work, nothing will happen when you push the power button--you'll have to hit the reset button on the bottom and then have to set the OS up again, starting with calibrating the touchscreen. Again, most people never change the battery, so even if the flaw is there they'll never know it, and most people who do buy an extra battery change it only rarely, so the extra time to make and restore from a backup are only a rare, minor inconvenience--so unless you really expect to take a lot of 6 hour hikes with GPS on all the time, don't reject an iPAQ because it has this problem--instead, if the problem is there use it to bargain the price down (I sell a dictionary system based on the hx4700, and I sell the ones with the switch problem for $100 less).
Last edited by privard : 27-03-2009 at 05:01 AM.
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