First PDA & Sat Nav

Very new to this, looking at iPaq h2210 with Tomtom 2, any advice on the below please.

1) Mainly need it for work (I'm a mobile windscreen fitter) need to be able to find houses in streets, I know it will find house numbers in towns, but will it be able to find a house in a rural location or say a farm, will it only be able to lead to the road it's on? Also will it find a business address or just be able to lead me to a business park or again just the road it's on? Basically how accurate is it for finding various addresses??

2) Plug in Compact Flash socket or separate GPS receiver? Mainly used for work but want to transfer it to my other car too. Separate GPS receiver will take longer to transfer the kit back & fourth but are they better for receiving signals? Would prefer the portability of CF. I did look at:

http://www.globalpositioningsystems....product_id=509

But not heard good things about the Evermore chipset...Any thoughts?

Many thanks

Dave