Musically the EX blends very well with my Mains in 2.1 mode. I am not a big fan of big bass in music. I like it for the fill in it allows. My Mains are very efficient so the power they need is minor. I love the EX but I also love the other sub too. I think if you have the room the EX will be all the sub you ever need. When you get your 1.7s post some comments. I am really leaning towards them for my system at my cabin. More for the music than for HT though.
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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