Update: My finger is on the purchase button for a REL Carbon Special. It will be $4,248.94 shipped. Everything is sounding great, but I know I will never get what a sub or array of subs will deliver. Even after hours of enjoyable listening, I head upstairs to the TV room and my 20yr old BA powered sub paired with Energy towers (cheap home theater setup) makes me smile, simply due to the emotional lows and punch I just cannot get from the Sopra 2s alone. For example, I listen to many tracks where low piano chords break the silence, my McIntosh / Sopra 2 combo is unemotional, uneventful. The same break in silence on my cheap home theater setup makes me hate the lack of lows on my system costing exponentially more. However, I know a sub will bridge this gap. I used REL's speaker pairing utility, which chose the S/812, but I've decided to take it a notch higher to the Carbon Special. This is not a conclusion, but another ask before I purchase to see if anyone can convince me to take a different route. I am hoping, asking for responses based on experience with REL, and better yet, with speakers in the Sopra 2 tier, etc. Side note: I have decided to avoid JL for the endless posts regarding reliability, so no matter what anyone says, I will not entertain JL options at this time. This includes seeing several JL subs for sale in the pre-owned section of the stores I've been in. This is NOT a JL bash, just stating facts from two months of reading, shopping and trying to avoid responses to go JL over REL. Thank you!