Waited eagerly for my A8X's, had almost a full weekend with them and then one simply faded and stopped working.
Andertons swapped the faulty one out really quickly so I had a working pair in time for the next weekend. Since then they've been totally solid.
The A8X's sound brilliant.
Really clear definition on the high end, fairly punchy mids and lovely bottom end.
They're pretty big monitors and they're not magnetically shielded, so need to be a good foot away from the older CRT PC screens, if you've got flat screens then you're laughing.
I demo'd a pair of the A7X and they sounded nothing like the A8X's. I'm not sure about the positioning in the demo room, I think the outlet seemed to favour Genelecs over and above anything else, so they got the prime positions.
The A8X's seem much more rounded than the Genelecs 8040/50A's that I've heard - I personally don't like the Genelecs but I love the Adams.
Would I change for another brand? No.
Would I recommend them? Yes, but perhaps for electronic music over live music.
Are they worth the money? Yes, definitely.
Is the build quality good? Hmm, I get the impression that Adam has a fairly high fault rate, but when they work they work like a dream. Don't believe all the negativity in the various forums - I'm glad I didn't.