That's the funny thing about them; they are so simple looking with no fancy shapes and yet they sound absolutely amazing. Really high quality veneers though. John, if you've listened to the S4s, then do yourself a favor and listen to the JAs (they don't have a comparable bookshelf to the S4 though). I auditioned the RM7Si Signatures with the S2 and the RM7 was definitely better and cost a little less. For sub, I might look at the HSU VTF-3 MkII. For a music only system though, I generally prefer no sub. I'd also DEFINITELY be looking at the Outlaw RR2150 stereo receiver, particularly if you plan to use a sub.