I really like my A3 hw version 104.
But I think currently there is no good device to reaplace it or upgrade it.
The A3 used to be a jack of all trades, but after removing the Dosimeter and making it an air monitoring device it lacks the most important part of the Uradmonitor, to monitor the worlds radiation level.

Yes the A1 has the dosimeter, but nothing else. That is maybe good if one only want to monitor Radiation.

But I got the A3 to upgrade from my previous A1 to monitor more things of my environment. I was lucky to get it before it got reduced functionality with removing the Dosimeter.
I had several people asking how to get one and I have to exaplain that there is no replacement.
Not everyone wants or even can build their own.
And the portable is not for fixed installation.

There should be a jack of all trades device, a new device that has all the new sensors And the dosimeter.