Yes, a bookshelf is defiantly preferable to the standard MTM design of most centers, due to the more linear off axis horizontal dispersion.
I only know common folk in my parts of the world and none of them have PJs, so I consider those that due have PJs to be more dedicated than the average person. Personally I prefer not to crane my neck to look at wall mounted TVs, but if I had a big enough screen I guess, it would be worth it if I could fit another 604 in there.
My secondary system consists of 5 older primus 150s, I do appreciate matching speakers, really!
To the OP, sorry about the jack.