Best PDA for sat nav, cameras ... oh and PDA-type stuff too

[Kinky]

I'm sold on getting a sat nav system and was sold on the idea of a TT 530T or 730T.

Note 'was' sold, as now I'm thinking that perhaps a PDA might be the way to go.

My criteria now would be a PDA that gives me the following .....

Wi-fi web access
Mobile phone
email access and usual PDA functionality
sat nav functionality (I guess probably TT navigator)
speed cameras database
And I don't know if this is pushing it - but traffic updates too.
Decent car mounting system

Does anyone have any suggestions or ideas?

Many thanks in advance,

K