Nuvi 200 Series: This is the basic series that Garmin has created. They are great little navigators for a great price that skip out on extra features that you might not use. You could say it is their budget series with only core features.

Nuvi 300 Series: These are the more average middle range of units. They run from your standard featured device to more high end aimed at people who intend on getting a lot of use out of their device. They don’t contain widescreens or the very latest technology like the high series.

Nuvi 600 Series: These are a bit pricier because this is an all widescreen series but they are almost identical to the 300 series aside from adding a few key features that are more recent in the higher models. The 680 was added a bit later than the other three and contains some cool newer features.

Nuvi 700 Series: These are the newest devices by Garmin. They are the very top of the line in GPS navigation with the newest technology and features. Prices are a little higher than the other series because of this.

GPS MSRP Maps Speech Display Yes Traffic Blue Tooth FM Transmit
Nuvi 670 $1071.41 USA, Can, Euro Yes 4.3″ Yes Yes Yes Yes
Nuvi 200 $321.41 USA NO 3.5″ NO NO NO NO
Nuvi 250 $428.55 USA & Can NO 3.5″ NO NO NO NO
Nuvi 270 $589.27 USA, Can, Euro NO 3.5″ NO NO NO NO
Nuvi 350 $535.70 USA & Can Yes 3.5″ Yes Option NO NO
Nuvi 360 $642.34 USA & Can Yes 3.5″ Yes Option Yes NO
Nuvi 370 $857.13 USA, Can, Euro Yes 3.5″ Yes Yes Yes NO
Nuvi 650 $642.84 USA & Can Yes 4.3″ Yes Option NO NO
Nuvi 660 $857.13 USA & Can Yes 4.3″ Yes Yes Yes Yes
Nuvi 680 $964.27 USA & Can Yes 4.3″ Yes Yes Yes Yes
Nuvi 750 $642.85 USA & Can Yes 4.3″ Yes Option NO Yes
Nuvi 760 $857.13 USA & Can Yes 4.3″ Yes Yes Yes Yes
Nuvi 770 $1071.42 USA & Can / Euro Yes 4.3″ Yes Yes Yes Yes

I thought I might be so nice as to provide everyone with a little chart and some brief descriptions that will take you through all that is the Nuvi series. No thanks required. I just hope this helps you find the right device that suits your needs and your price range.