Excellent speakers there and I second your recommendation. ATC are a clear cut above B&W in my opinion. They will do much more than give B&W speakers a run for their money.
Interesting to hear, I have not auditioned any ATC speakers so I can't comment on how they compare to the B&W or any other speakers for that matter. Regarding my comments earlier, on B&W 803D3 I was assuming Rob bought the new 803D D3?
If on the other hand he bought the predecessor 803D,well,he still bought a nice pair of speakers.But not as good imho as the new B&Ws which from the admittedly little exposure I have had to them so far, still are in a different class than the earlier 803s.
For one thing, the earlier 803D was not really digging deep enough in the bass as I remember them.
They started going down in level already around 48-50hz which was a problem in some pro recording /mastering conditions where some masterings done via 803D were compensating eg raising bass levels which sounded unnatural on speakers with deeper/flatter bass response. In some cases I know of ,some deep bass rumble was not heard by the mastering engineer. But heard clearly by people like me, with speakers that dug deeper than the 803s used in the mastering room.
As far as the latest B&Ws as good as they are,personally I still find electrostatic speakers to be the best I have heard.
They deliver the most believable soundstage, and utmost transparency,and the lowest distortion. And at their best no crossover filters needed at all, or at least ony one from 22-24khz and down to in some cases 250hz or lower,before upper bass kicks in either with a large bass stator or a dynamic one as with most ML speakers. And all this combined with best attack and transient response imo.
There is also a reason why some very SQ conscious labels monitor via electrostatic headphones.
I know one recording /mastering engineer who masters projects via 5 large full range electrostatic speakers.
Cost no object, I would probably go for either MLs R15A or even their flagship Neolith.
Since I listen 99% to acoustic music, and mainly large scale classical I want both "quantity and quality" served in a good combination.
A symphony orchestra is BIG and I want it to sound big even via speakers.