Correct not a PND
As do I, but that is not a PND (portable navigation device) style GPS like the OP was referencing. I also use a mag-mount GPS "puck" with no display at all.
Before I accidentally crushed my ETrex Legend (forcing me to purchase the 60CSX, oh darn) I used it, as well.
You are correct not a PND but a very good gps to have (The 60CSX) as it has the NMEA output and works wonders with nroute and a laptop!! Not to mention it is awesome all by itself with Citynavigator and a 2gb card. Can be mounted with a RAM mount and viola! Just what the OP wanted!!
The OP needs to find a gps handheld with NMEA output right? Lots of fun with the handheld and the added bonus of connecting to the scanner for location based scanning. PND's are nice but for driving only, I wouldn't buy one. If the OP can manage without voice commands the 60CSX is what he needs, it has turn by turn directions if you upload the Citynavigator dvd. My humble opinion is to have a handheld with NMEA output. It'll satisfy the GPS input for the scanner as well as function for someone on the go in the car or on the trail or quad, boat, or horse. I even tried it onboard an airplane just to see where I was during a night flight. (Above 10,000 feet of course).
The newer gps handhelds (are you listening Uniden?) have bluetooth wireless connectivity for connection to computers, I'm not sure about NMEA data streams but how hard could it be? The newer scanners should have either bluetooth inside or a usb port to add the bluetooth capability and avoid the extra cable. It can't be that hard to do, if a cell phone and a $300.00 laptop can bluetooth a $500.00 scanner should too!!
(OP) Forget the cheap PND's for sale this Christmas season and go find a Handheld GPS with NMEA output, you won't be sorry. My advise is to go Garmin because they have the best gps products and customer support as well. The others are cheaper on some comparisons but the old saying, "You get what you pay for."
I have to go write my letter to Santa now. (scanner with Bluetooth GPS and programability, Multicolor screen like my MP3 player, interactive displays on the gps from the scanner to show me the site locations, etc. etc. )
Upman you have a nice Holiday! I still like the Undien scanners but the future in this hobby lies with integrating all my toys to work together. My $.02