KRA

My current setup is: Front speakers: Pair of R-28F Center: RC-62 II Subwoofer: Energy (from a previous setup) Surround: Pair from Quintet (from previous setup) Looking to change the surround speakers and would like suggestions on what to go for. The set that Klipsch sells pairs the fronts with R-14S surround speakers. Also read on some forums that bookshelf speakers are a good choice for surrounds. (R-14M or R-15M). So I am now trying to decide: R-14S or R-14/15M? Suggestions?