What is a good Sat Nav unit atm?

My Old man has a Philips Carin (now vdo) and I reckon its a great system.

I see these Navman Satnavs advertised.

The Idea I have is to put it in the compartment which sits on the Dash in the Mazda 6 MPS, however the top of the unit will be covered and I am unsure if the antenna will work since it will be covered. Are they like the Carin where they have an external antenna or will it work?

Cheers

Many choices to choose from.

If you are like me, you will build your own. However, you can get a nice "garmin" unit that will come with a cradle and maps to boot.

I have personally used the Navman GPS 3450 Sleeve, works nicely with a PDA.
I was able to use both the Navman provided software or third party stuff, i would say its highly recommended.

The new PN series of the Navman is pretty good too.

Pete.

I use Garmin at work- i think there some of the best-really easy to use menu system-simple and accurate!!

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04 LL Bean Outback

a mate of mine has the TOMTOM GO series. they are really acurate. it can even tell if your holding the system and spin around in a circle, the screen rotates with u. Not a bad unit.. bit $$$ tho..

I picked my Mio 136 up for $550. Uses the whereis.com maps, has a 3.5 inch touch screen. Has been perfect so far except it tells you when your speeding like a second wife haha. external wireless antenna is 60 bucks so Ill getting that next. The battery life is good at around 8 hours, handy if youre on foot.

the tomtom? one of the guys at work has one, we were meant to go to cannington from east perth but the tomtom tells us to go to mitchell freeway....... the navman that the other guy uses is pretty good though