What are the big real world differences between these two PrePros???

Is it worth it to upgrade from say a 950 or a 1050 receiver???

Thanks for any insight or experience you care to share...

Bill
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Outlaw 1070***3 Klipsch Heresys Across the Front W/Crites CT-125 Tweeters***Klipsch KSP-S6***Oppo BDP-83***Outlaw LFM-1 Plus***
Panasonic SA-XR 57***Klipsch RB-5s***Klipsch RC-3***Outlaw Audio M8***

...Let the Movies and Music Play...