I used Diamonds (8.2's) for some time a while back -- There were a few places that considered them a fine "small reference" (and they were...). Got a call from one of Wharfedale's designers asking if I'd be interested in trying out their new "Pro" line --- That's where I figured they'd jumped the shark.
It'd be one thing to have an ad which would've said "We couldn't help but notice that our speakers are finding their way into more and more professional audio facilities..." but instead, they had to hit a ridiculously low price point and slap "STUDIO MONITOR" on the side like so many others already had. They didn't need to make a new speaker based on an existing speaker - The existing speaker was great. They just needed to tell the right people (in this case, home and professional studios) about those speakers. The "Diamond Pro" line sounded "okay" against the Diamonds and IMO, eventually watered down the brand to anyone who would've otherwise given them a shot.