Whether you knew he had already bought the BMR's or not, I cannot understand why you would make such emphatic statements about the 705's being superior to the BMR's!
You could not have missed that they were his primary candidate (assuming you scanned the thread before posting), and I know you've been around here long enough to know that the BMR's have a stellar reputation, and since you have experienced Murphy's modification of the Pioneer BS-22, you are aware of what Murphy charged to for his work (not much more than the cost of the components).
So, why is there no doubt in your mind? How are you certain that the BMR's cannot be better than the 705's, equal, or, at least, worthy competition at 40% less than the 705's?
For starters, the BMR's reasonably can be expected to have better bass, given a larger woofer and larger cabinet (the BMR is the speaker he sent to NRC to measure at 32 Hz - 20kHz +/-2db Anechoic). The 705 S2 is spec'ed at 45Hz by B&W.
Weight is no solid indicator of SQ, but the BMR's are 38lb ea. vs the 705 at 20.5lb ea. That is 85% more which is more than the larger cabinet by itself would account for.
Every speaker Murphy sells represents an incredible value - he is not trying to make a living or grow his business - aside from the $50 he donates to the local orchestra, he gives himself a modest pay rate (around minimum wage) for his labor, and depends on word of mouth for his marketing budget (free). He is retired and just happy to share his talent and passion!
B&W has a reputation for a quality product, but no one has ever accused them of not maintaining their profit margins.
I am not trying to convince you that the BMR's are better speakers. I have not heard the 705 S2's; however I am trying to get you to consider that they just
might be better speakers. They are very good, and, aside from bass, the RAAL tweeter is an established "world class" tweeter!
CB22,
In case you missed it, one truly amazing stand-out aspect of the BMR speakers is their off-axis performance! I cannot say for certain you will like it (I do), but the red line is on-axis and the green line is a whopping 80 degrees off-axis. As you can see they track within 5dB of each other throughout the frequency range. Likely, any seat you would listen to music from would be less than 30 degrees off-axis (the blue line) which tracks close to within 1 dB! Effectively, there won't be a bad seat in the house! It is somewhat uncanny!