I've loaded the street maps on there and it works great; I've used it to street navigate since I got it. But it would be nice to be able to navigate with the car GPS while reading about the cache on the handheld (all single handedly of course

) so when I get to the gz I'm ready to jump out and find the cache in record time! Looks like I'll be taking someone/s up on the GSAK lessons.
So final question just to clarify, would there be any advantage or disadvantage to getting a TomTom or a Garmin when I use a Garmin handheld already? Or does one have nothing to do with the other?