Thanks for the perspective on the 430. I know that the full IFR
installation on the 300 is a lot more complex, however I'm just looking
at VFR capability right now. The plane (a 50s vintage warbird) has zero
navigation equipment installed other than a Garmin 195 handheld (no
VORs, no ADF, and old electric gyros with no vacuum system)

I'm a long ways from an IFR capable panel, but I'd rather get a GPS
that could eventually be used IFR vs one that would definitely have to
be replaced at that point.

It looks like there is about a $3K difference in fully installed prices
(for VFR capability) between the 2 boxes, but I'm trying to confirm
that.

Thanks,
Eric