I fly with the garmin 496 which seems to have every bell, whistle and feature accessible thru a logical user friendly interface that makes navigating a doddle. I've also flown other aircraft with the old IFR certified Garmin 300/430 and King KLN and no matter how hard i try i just cant get the use out of them without pissing around for ages with the buttons and pages which makes me not bother using them. I suppose the manufacturers strip all the gadgets out to get the IFR certification. Anyone here used the new GTN 650/750 units they look like they combine the utility of an IFR box with the ease of use and features that the VFR units have.