I have them both. To date I have not noticed much difference in receiving ability - but I know that is going to be very specific to terrain and what frequencies that you are trying to listen to.
The thing that I like about the 92 is it will priority scan while scanning both trunk and conventional (although it will not pr scan while doing the trunking part).
I think the 92 is a little slower scan speed - although I've found the 780 really isn't as fast as advertised if you are using PL tones.
I like the 92 if for no other reason than it has the alpha tags for the frequencies.
I also use a couple of 245's primarily for situations where I want to scan a lot of frequencies fast.
Radio Shack seems to have pretty good sales periodically on their equipment so I'd keep my eyes open if you determine you want one.
Regards,
Wayne
