I have been VERY happy with the system provided by Control
Vision--Anywhere Map. See www.controlvision.com.

This system uses a PDA (normally an Ipaq or Dell) and Control Vision
software. The GPS function is outstanding--and you can add uplink
NEXRAD weather. You still need a GPS input, and can use any GPS from
a simple "mouse" unit like the Garmin 35 to an old handheld.

One beauty is that the system can then run any of the gliding specific
programs such as Win Pilot or Glide Navigator. No extra expense for
hardware. Anywhere Map includes full airport info, approaches, and
more.

Control Vision's website offers software only or complete systems.

Good luck--

Skip Guimond