I am a LONG time Tom Tom user. I finally gave up my stand alone GPS and opted instead for the Tom Tom iPhone app instead. Gets me down to ONE device and it will route to contacts. I use it for business & personal travel but its nice to not have to put in an address...just route to "John Smith". The app itself is cheaper than a stand alone device and easier to update (Seems to get more updates for free too). Plus, once you buy the app anyone on that same iTunes account gets to download it for free. So my wife has it on her phone as well.
Of course you would need a smart phone though.
PLEASE do not send questions via Private Message, my inbox fills up too quickly. Post questions in the forum as a new thread so that other users can benefit from the answers. Use Private Messages for sensitive information only (VIN, Contact info or things you do not want the public to see).