Pros: Good soundstage, detailed with enough bass. The smaller a3x lacks (too much) bass. Although the bigger a7x as more bottom end the a5x delivers enough.
Cons: None that I can think off. Then again I don't have any other monitors to compare to
I purchased these as part of a desktop set up. I use them to mix (logic) or listen music. Rest of the set up: iMac > usb out via M2tech hiface II > metrum acoustics > adam a5x. Beware, I don't have any other experience with monitors in this setting.
The a5x are positioned in the middle between the smaller a3x and bigger a7x (I think a a8x also has been released).
The overall sound is balanced and clear with a good soundstage. Especially in a desktop set up I find them delivering on all fronts. I checked out the smaller a3x but these lacked too much in the bass department. The a7x were good, but to big (and pricier) for my taste. Top end is present but not harsh. A nice feature is that you can link the two units and control the volume with one knob. Handy.
Overall they are great monitors.