GARMIN 530 Plus FlightMax

Does anyone make a GPS device with a Multifunction display that can
overlay weather downloaded from satellite? My search so far has not
gotten very deep. The Garmin 530 looks like a really nice navigational
device with a good multifunction display, but it does not seem to do
weather overlays. The FlightMax seems like an excellent weather
information source, also with a good display.

It seems like it would be useful to have a Garmin 530-like device, but
have the ability to turn a weather overlay on and off. That way, one
could most easily see whether the weather on your flight path is a problem.

If this device does not exist, is it that it is technically difficult,
or do designers (and perhaps pilots) think this would be too much
information on a single diaply device?

By the way, I am talking a General Aviation device here, in the price
range of $15K-$20K.

-Sami