To be fair, as others have said, SBLs aren't about room-shattering deep bass. But what they have is tuneful, I don't think anyone can argue about that. I'd probably have kept my black ones (that Samantha traded in when she bought my Avanti IIIs) but they were pretty ugly.
In the end, there are other options that offer a similar approach without quite so much faffing- my Trios are one example, but again they don't do massive bass. Fastest box speaker I have ever heard though, absolute crackers, even if I needed to add a sub to shore up the foundations...