In-Car GPS systems
 

So I've finally decided to invest some money into a GPS navigation system for my car. However, I have no idea what to get or what's a good deal or not. I, particularly, was looking at two such itmes:

-Tom Tom GO 910
-Magellan 3000T


So if anybody has these or knows a lot about such, could you throw some information my way? I'm currently testing and using a Tom Tom GO 510 and am unbelievably impressed with its clarity, sophisticated technology, and ease of use. However, I heard Magellan makes promising and reliable car navigation systems as well.