Which GPS device do you find the best? Myself, I prefer the Mio because they are the easiest to unlock plus you can install almost all of the different navigation programs. TomTom can only use TomTom and Garmin can only use Garmin.

I prefer a 5" noname Chinese device, WINce 6 with 128mb RAM. No need to unlock, and you can install almost all of the different navigation programs.
I have one like this for more than 3 years now, for $70, no complaints.

Whatever is cheap lol. Got my first 3.5" binatone for £10 and found this site. Installed igo and lots of maps and sold it on eBay for £20. Bought a 4.3" for £10 and again installed igo and still using it. Being tight I like all things cheap. Must be the Scottish in me