On the Phantom of the Opera, the mid range was fantastic, with vocals very pure and individual vocalists easily placed in the image. The Signature SE cabinets are just so inert all over them, such that you can hurt your knuckles if you rap the speakers too hard. The best thing about them is the Air Motion ribbon tweeter and mid driver, which offer vocals with no coloration at all. As illustrated with Sade's Lovers Rock, the bass is also impactful but very nicely defined when reproducing electric bass.
Regarding the Signature SEs, I've also recently listened at brick and mortar shops to some other speakers that sell in the $7K price range, and generally they are smaller, and use 7 or 8 inch woofers, resulting in less bass prowess and extension, and they never have the ribbon tweeter technology that you get with the Legacy. For overall performance and value, I keep coming back to the Legacy. Hope this helps!
http://legacyaudio.com/products/view/signature-se/
https://www.ravenaudio.com/Blackhawk-Limited-Edition-Integrated-Amplifier_p_21.html