Then Polk OWM 5 should do it for you..
Aavnt LCR250 has been discontinued & replaced with newer models in the same range..
I think it is Bipole..I haven't heard the S-100, but i use an other Platinum speaker LCR60 as surrounds..(Abt 11 cm depth)..
Choosing between bipole/normal speaker would be to do with room dimensions & preference..
This post should help you -
http://www.hifivision.com/speakers/...ar-level-angled-tilted-better.html#post710879
I know couple of FM have S-100, post your query on Taga owners thread, and that FM should help you with inputs on S-100..