For the tomtom rider experts: what is the difference between the "urban" models and, well, "non-urban"? e.g. I can find the urban rider pro with uk and Europe maps & headset for 288. I can also find (on say halfords) the tomtom rider v2 europe fo 339. But I also find the rider v2 on the handtec.co.uk site for 299. Given that used TT rider v2 wih european mapping seem to be going for around 250 on ebay, buying new seems like a good option at these kind of prices. It's just that the tomtom rider range does seem rather broad - so what do I lose by going for the "urban" model?