which model is the better one?

Magellan 1470 or 1475 or Garmin 1490.

both of the magellans are 4.7" whereas the  garmin model is 5"

with regards to the 1470/1475 models, are they basically the same, but
the latter having traffic link support?

is traffic link worthwhile getting?

both seem to have some minor/major issues.

I see that there are some complaints about Garmin 1490's lack of map
detail something the 765 series did not have a problem with.  is map
detail that important?  I suppose it helps to know the name of the cross
street.

However, I see that magellan is releasing a 7" model in 2 weeks.