I would say Tom Tom, or Tom to his mates..... simple and easy to use, update etc and can pick up at a good price these days. Looks like you can get some real wizz ones, but my Tom Tom One seems find.
However when planning your getaway, why not have a look at the site on Google earth, interesting to usem you can see access roads, locality etc and also pick up on the things never mentioned like a nearby industrial estate, railway line etc.
