Which is th best gps system you think in a market?

There are many excellent units available and it depends on which features are important / unimportant. For me, the garmin 2720 is the unit. i like the large screen, a screen which is just as easy to see at noon in August on a clear sunny day as at night. It can have up to 50 routes - I like to use customized routing for some of the time, and building the routes and downloading / storing is important to me. POIs loading is a big plus. TTS voice another.

If my needs would change a lot over the next 4+ years, there will be even newer units with even better features for me to pick from.

I am a big fan of the nuvi 660 with its larger screen and diverse features. The battery life is also quite good (5-7 hours).

Not trying to be the grammar police, but please try to use punctuation and actual words when posting. It makes it much easier to read.

It is easy to recommend what you own, but what is right for one person may not be for another. I have a Zumo 550. Love it!! But if you are not using it on a motorcycle, don't need to carry it by hand on occassion (built in battery) or desire MP3/ bluetooth capability or if you need a larger screen then it is not your best choice. In short, there is no right general answer. You need to decide what features are important to you and how you expect to use it. The importance of cost can also come into play as can included options. Once you narrow down your choices, you can then ask about specific pros and cons users are having with those particular models. Good luck.

Here's a fairly comprehensive collection of GPSr reviews, tips, and information regarding selecting a unit to meet your needs.

http://gpsinformation.net/