sat nav reviews?

[UKbob]

Following the london tunnel run, i definitely need a sat nav system - does anyone have a link to sites which compare and rate the various models?

[UKbob]

rico said:

www.pistonheads.com/gassing/forum.asp?f=153&h=0

I didnt see that

kippax said:

TOM TOM 5 is definately the way to go at work there are many different ones being used but everyone agrees the TOM TOM is by far the best. I use it on my PDA which is just as good as a TOM TOM GO but has the advantage of being a decent pocket pc too. The points of interest that you can download are fantastic too. Thanks Howard.

So the 5 is the same exactly as the go, with the only functional difference being its a PPC?