Suggested surrounds for open-layout room

Almost done with the buying process on my first house, so it's time to get this started again!

I have a...let's say 24x15 room. Only wall is the one the TV will be going against. Behind the couch is open to the dining room and kitchen.

Let's see if I can work this in paint...
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I'm not sure how best to handle the surround in this situation. In-ceiling is, at the moment, not an option unfortunately. I only have maybe $1500 for the whole setup (not including 2 fronts, which are RTi10s), so price is an issue.

Suggestions?
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mystik610 wrote: »
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My System:


TV: SAMSUNG UN55B7000 55" 1080p LED HDTV
HTPC: Chromecast w/ Plex Media Server. Media streamed from Media Server.