Overhere
I don't know where the
Transonic Dragon is getting his information from, but I have to disagree completely.
I have -
Garmin III Pilot - good basic GPS - now relegated to the flightbag as emergency backup.
Garmin GPSMap 296 - on the control yolk of the Bonanza. Absolutely magic little machine. I have NEVER had any trouble seeing the colour screen in sunlight (you can turn the brightness up). Can't tell you off the top of my head how long it runs on the battery cause I generally have it on power but I think its about 10 hours. I have looked at upgrading to 396, or 496 but can't convince myself that they are worth it as in Oz we do not have access to all the add-ons like weather, etc.
In the panel of the Bo I have a Garmin GNS430 with the terrain upgrade. Fantastic bit of gear.
I would not look at anything other than Garmin.
I also have a Motion Computing Tablet computer on the yolk of the Bo, running Jeppessen Flightdeck with the GPS info feeding from the GPSMap 296.
If I can help you with any specific questions - fire away.
FTDK