I have owned the SB3's. However, in terms of detail, I think the SB3 design sacrifices some detail for the extended bass these speakers are capable of.
If I were you, I would get a pair of small floorstanders in place of a pair of bookshelves. Unless of course you really want bookshelves.
Like I said, I used to own a pair of SB3's, but have since replaced them with a pair of floorstanders.