so many PDA's which one?

At the moment i'm using a laptop for my sat nav (32 ton Truck) which is fine and it works really well.
I now want the same system in my car, so i need a reasonably priced PDA (laptops to big to be practical in the car) that will take it.
I use Navigator and the haicom 204e, but the trouble is it says it needs 300MHz processor and 550meg space and the screen res is 800x600
I've been told it cant be done and to use a tft touch screen instead (and the laptop goes in the glove box)

Any body got any ideas?

Oh, and i'm new, great forum by the way!

[Stevie]

Smiffys the PDA based systems will run only on PDA's, i would recommend that you check the two polls that are running to see what other customers are recommending.