The right GPS system for you is the one you chose and like! Never mind what anyone else feels about it.
I have customers that love the NavMan unit that we find some what lacking, it all depends on your individuality preferences.
Believe it or not, most European prefers the NavMan and Tom Tom over the Garmin or Magellan, in the U.S, we are more comfortable with the Garmin and Magellan, why? The Tom Tom from Amsterdam, Netherlands and NavMan from New Zealand are designed with European user interface in mind, what one feels in Europe that is logically, may not be for the U.S users.
Tom Tom was taught by Magellan many years ago into how to integrate their PDA's platform with GPS and Magellan showed them also with how to improve the user interface.
Magellan by far had the easiest user interface, now Tom Tom and Garmin is coming out with even easier user interface by it also sacrifice features for ease of use.
When customers ask which is the best system out there in the market today, I normally have these answers.
1] In the U.S, by far over 50% of the consumers that is purchasing aftermarket GPS systems is purchasing the Magellan RoadMate 700 not the MRM760's.
2] If you need more ability and features, and you are familiar with loading maps with computers, the Garmin 2620 or 276c appears to be also very popular with the users that wish for more features.
3] If they just plan don't care and wish for a unit that they can walk with, the Tom Tom Go or the Garmin c330.
4] If they wish the best prices, the NavMan, Mio or Initial units is not bad,
5] If they wish for a lager screen, the Lowrance iWay, Cobra, AvMap and PLink is an option.
6] If you need traffic and are willing to subscribe to XM, try the Pioneer AVIC-N2
7] Like really small with battery or PDA format, try the Mio 168 or 269, Garmin Quest or iQue, NavMan 510 etc.
8] For motorcycles, looks to be the 276c Garmin is the people choice.
Again, the right GPS unit is the unit you will use after you buy it, the most expensive GPS unit you can buy is the one you don't use after you buy it because it is either to hard to use or you don't like it.
Do your research first, if a friend that have, ask to see the GPS unit in action and make up your mind before going out purchasing one.
Support your local GPS dealers nearest you, they can use your help.