Hi, Mr Beachams, just thought I'd add my bit. I have had SHB Avatars for a couple of years, between CDP & amp, and they finally replaced a Flashback i/c. The Avatars were initially far too bright and "forward", so weren't used for a while, then I bit the bullet, left them to mature, and they've been there since.
There's plenty of fine detail and texture, enough bass for my taste - I listened to Yello "Touch", last night and wondered how much lower the bass would go with a sub. I was tempted by the Quintessence, but wasn't sure - wish I'd tried some. As there's a money back guarantee, you should give them a go, let them mature for a week or two continuously, then send them back if not happy. Perhaps their only down side is their thickness, they need room, and aren't really flexible.
As is frequent advice on this site, let your own ears decide.