5Hz sampling is a waste of time and money on a consumer GPS. You haven't moved far enough in .2 sec to make any difference. Any bluetooth GPS will work fine, AFAIK they all use NMEA protocol and standard bluetooth connections. I have an F-tech with solar cell, which gives somewhat longer run times during daylight. I don't think that's very important, however. It cost about $35 and works fine with everything I've tried it on, including Palm, Windows, and Linux.

The GPS receiver doesn't give you voice directions, mapping, or anything else. Software does that. Standalone units, such as the Garmin Nuvi, have both the hardware and software in one unit, and you don't need anything else with them. They even have mp3 players and bluetooth for phone connections in most models, so you can call the restaurant you're being guided to. You pay for that capability, of course.

My TomTom works

Internal GPS on my N95-3 using Symarctic ExtGPS.

Pros: A-GPS in my phone, which I'm going to carry along anyway,
Cons: GPS and Bluetooth in phone use a lot of battery power, GPS is only an 8 channel unit (but I have no problems with getting a quick lock, unlike some N95 users).

Hi, I can vouch for the i-Blue 737 too. I'm a newbie and was able to get it up and running with Maemo Mapper in no time. Out on the road, the performance is outstanding. Way better than my Holux GPSlim 236 which is pretty much useless in bluetooth mode. Good Luck!

yooper,
Can you please expand on that? I'm considering the GPSlim 236, 240, and M1200. More inclined to buy the 240 or M1200 b/c of size, but I'm wondering what issues you have with the 236 and Bluetooth, since I think they are similar devices.

My GPSlim was easy to connect to the N800. The bluetooth works fine. HOWEVER, I won't recommend the GPSlim 236 because sometimes it is reluctant to connect to the satellites. If you search for "GPSlim 236 intermittent" you'll probably be able to find some complaints.
If I was buying a unit now, I would look for one that logs your route internally. You could use it to track a vehicle, a person (yourself), etc.

Does anyone know if it's possible to use my razr's GPS VIA bluetooth?

I got a GPSlim 240 and it works fine. The only thing that bugs me is that I have to plug it into usb to charge it. I don't always have my laptop with me, so I'd rather plug it into a wall plug.

I don't know what is meant by "pretty much useless in bluetooth mode". Is there some other mode? Anyway, as I say, mine works perfectly most of the time. When I was on a cruise ship off Mexico, there were some times it didn't work, but I was scooting the GPSlim up close to my window and it didn't have that much sky available... Maybe I should have gone outside...

The GPSlim is rather old technology, and won't work as well as newer units which can track more satellites. As for the charging problem, just get a USB charger. You can get them for both 12VDC (cigarette lighter) and 120VDC, for less than $10 each. You just plug it in, put the USB cable into the port, and charge.

I have TT ver 3 and although it will pair with N800 unable to get it to work with MM.
Had old Fortuna Clip on which worked a treat, now trying without much success to get Zycast SG289 data logger to work