Hi Kathleen. Welcome to the forum.
As I read through the thread, I was formulating my thoughts, and had a pretty good idea of what I was gonna say. But, then doggone Tom went ahead and said it all first.
His advice, IMHO, was impeccable, particularly:
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Don't feel obligated to get a VP150 in that size room"
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I would definitely start with mains+sub, especially if you watch a fair number of movies."
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...the EP350 is worth the extra money. The wide openings you have into other rooms would probably warrant the upgrade."
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...I'd rather have the QS8/VP100 than QS4 and VP150, especially in that size room."
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Don't let these guys try to talk you into an expensive receiver. Just get the features you think you need/want."
HEY! Thanks Tom. It was much easier to copy and paste than to type it myself.