I am looking to replace my current surrounds which are Def Tech BP2x bipolar speakers. Placement is currently on the ceiling (about 12"-18" behind my chair) as my room is open on the right side so there is no way to wall mount. I would like to go with a direct radiating speaker as I have read recently that they are better than bipolar speakers with todays discrete soundtracks.
So my options are limited to either small book shelf speakers mounted on brackets on the ceiling. Or I could go with a flush mount type speaker with tweeters that can be adjusted for optimal sound. I know both options are not the most desirable but with my room it is about the best I can do.
As far as options is mounting the surround speakers on the back wall a bad idea? Would mounting the surrounds on the back wall be a better location than on the ceilng? Also what would be a good speaker that would match up with the STs and Song Center? I'm sure Jim could build a custom speaker for my needs but I do not think it would be in my budget right now.
Thanks in advance for any advice and suggestions for speakers

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Bill