If you need assitance you can contact me by PM
I use ttmaps on my Tomtom and OziExplorer on the China-brick.
If you need maps, check here :
:link:One thing to keep in mind is the size and mount of the GPS.
I rolled my car and the 7" China-brick stayed securely on the windscreen.
Imho anything bigger than 7" is getting too heavy and too bulky.
The quality of the maps depends on the source but using proper zoom levels and a good map on a 6" with 800x480 pixels is fun.
Make sure to buy a device with at least 128mb Ram and a Cpu faster than 400mHz, the rest like BT, DVB-T or a reversing cam is optional.
On a CE5 or 6 device you can use OziExplorer, Igo, Primo, Papago and so on.
Here in Australia the Igo maps are better in remote areas than TT, for example smaller tracks in the national parks are mostly included where on TT they are missing.
Garmin has the best selection of maps in really good quality, but you need a proper Garmin device to use them with all features.
For our region the cheapest source for a GPS would be Chinavison, that's where most Ebay seller get their devices