Wow... great advice in this thread! I have only one thing to add that may not be an issue since your company is paying. When I was travelling weekly for work I rented Hertz due to the nav system so I could get around in a strange town. I found quickly (this was in Vegas) that the price was about 2-3 times any other company without a nav. system. I promptly went out and paid $1000 for a killer, portable system and started renting the less expensive cars (but I treated myself to a higher class since I was saving so much $$) and then I had use of the system at home as well and I just LOVE it! So, something to consider if your company will reimburse you for the system; I think they are down to $500-$600 these days anyway.