I would keep the BC780's as they are far better radios than the BC796
which is less sensitive and has a slower computer interface. The BC780
is just a classic Uniden radio, best in its class when it was made. It
makes a great MilAir radio and it is useful in scanning those LTR
systems if you have any important ones in your area.

This ham has seven BC780s!
http://snipurl.com/6rp1

The BC796D may decode digital but it is bested by the PRO-96 digital
scanner made by GRE which is easier to program and the PRO-96 sounds
far better in digital mode. The PRO-96 has built in features like
instant tone decode and the very important Sys ID scan to identify
those trunking system control channels, a feature found only by running
an external computer and a TRUNKER type program with a Uniden scanner.
Add a PRO-96 which is destined to be a digital classic radio to your
collection and keep at least one of your 780's and you have the best
of both worlds, digital and analog.

Ki4je