Well it's what you can afford I guess. You can spend $3000+ on a colour moving map unit that uses 8 x AA cells each time you turn it on and includes its own instrument panel just in case.
These units are great for completely f*#king you situational awareness. Was checking a pilot once who whipped his out for the flight. He was quite happy barrelling along fixated to the screen completely oblivious to what was going on outside. The scary part was when I said he couldn't use it anymore.
He became lost in a pretty short space of time, and this was a 1000+hr CPL. Clock-Map-Ground
I think the best handheld gps is the cheapest one that does the job. For me it's the MAGELLAN 310. $300 at any Tandy, 100 waypoints, dist, gs, eti (eta if you use your watch), miles off track, etc...... Takes 2 x AA cells (Duracells will last months if used sparingly).
Sure it doesn't have a airspace database but that's why I carry an ERC.
