I'm thinking about some Beta 50s and an Infinity center channel speaker. The Beta 50s ar $500 each, while the Primus 360s are $300 each. I'll be getting FOUR each. I ultimately want 4 speakers, 1 center, 1 sub (for surround sound). Are the Beta 50s that much better? Here's my goal: I want a good musical sound. To me, if it sounds good musically, it will be good enough for surround/home theater. If I get the Primus 360s, I would get a sub right off the bat. Maybe the Infinity SW12. If I get the Beta 50s, can I hold off on the sub and add that later? Is the bass good enough as-is? Which Infinity center speaker is the best match for these speakers? I have a receiver on order - a Panasonic XR55K. (Later in the year, I may think about upgrading to a Marantz 8500.) Am I on the right track? Thanks for any advice. EDIT: Oops - I should have mentioned, my living room is approx. 25x25, with a vaulted ceiling approx. 10-12 feet at it's peak. One other note. Strangely, Circuit City lists the Beta 50s on their web site for $299 each. It has a small icon that says "Outlet". Are these refurbished, blemished or open-box items?