Handheld GPS
FWIW I too chose a black and white display. Better visibility when I need the sun to be in the wrong place, and better battery life. But my requirement spec was very basic (to tell me which way I am going, which way I should be going, and how far I still have to go - basically a backup to ADF, DI/compass, VOR, DME)
But each to his own - and I suspect black and white is not so easy to get now!