Opinions are like a certain part of the anatomy. Everyone has one... and depending on...

I have a 7900 and like it but I can live with a couple of quirks. I prefer my 7800.

Basically, dual band is one thing. Does it have a dual band display? the 7900 does not.

However, that is not a big deal for the majority of use.

My knock on the 7900 is the big band dial on the lower right on the unit. It is an easy target for incidental contact and changing frequency. That can be cured by careful selection of mounting location.

For me, the key point is do you expect to have a hand-held in addition to a hard mount unit? Or, are you going to have multiple units?

And, do you really want (or need) to monitor two frequencies at the same time?

The 7900 is duel band, but, it only displays a single band.

It is a good functional unit.

And, if you expect to have more than one radio, I recommend that you keep within the same manufacturer as each one has programming differences.