I am thinking of getting a used HP iPAQ hw6920 Mobile Messenger http://www.hp.com/hpinfo/newsroom/pr...006/mobility/d...
http://h18000.www1.hp.com/products/q...12352_div/1235...
and installing Garmin Mobile XT https://buy.garmin.com/shop/shop.do?...413#featureTab
I am just wondering how this might compare to using a standalone GPS. I have read mixed reviews about the HP iPAQ from istes like this HP iPAQ hw6915, hw6925, hw6945 - Windows Mobile Pocket PC Phone Reviews by Mobile Tech Review My big desires is to have an all in one unit that is a GPS, cell phone, and wifi without breaking the bank.

I have an hw6925 and use iGuidance on it. It works great and I am very satisfied with the GPS on it, but I have not used any exteranl GPS devices, so I really can't make much of a comparison.

Being able to use Google Maps is also great.