The LCR is 90 db efficient so that is towards the low end of the spectrum. Look at some of the stereo/Home Theater mags for reviews. Check out all the major manufacturers for there various products. I have Klipsch in my main system and they are very efficient. Try Aperion, Paradigm, Polk, Yamaha and Sony for starters and anyone else you can think of. Are you going to use your LCRs as the mains or are you looking to go bigger.
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Music system
Model 990/7500/Magnepan 1.6 QRs/Technics SL1200 MK2/Aperion S-12 Subwoofer/OWA3/Sony NS75H DVD
APC H15 Power Conditioner
TV System
Large Advent Loudspeakers/ Polk center/Monoprice surrounds/Panasonic Viera 42 inch/Onkyo HT-RC260/Sony BDP S590/Directv
Home Theater System
Onkyo PR-SC886/Outlaw 7125 Klipsch RF-82 L/R,RC-62 center, RB-35 SR/SL, BENQ HT1075, Outlaw LFM1-EX/OPPO BDP-83/Directv
Harmony ONE
Blue Jeans and Monoprice interconnects
APC H15 Power Conditioner