I was going to start a new thread. But I have a setup very similar to your original... Different receiver - Denon 2312CI, and two subs - Mirage S10 and S12. But I have the same Pro Monitor 1000 for RL and Surround, 800 for height, and ProCenter 2000. My living room is big with high ceilings and a connected kitchen. I hope you don't mind if I tag on to your thread to hopefully get some more info.
I have limited space for speakers since the TV is over a fireplace with no space for towers or even large bookshelves. The ~7" deep mantle and a little bit of wall space on both sides of the TV is all I've got up front. When we started looking for a larger TV, I wanted to see if there was any way to free up some mantle space and improve on the Def Techs.
So I started my search for slim, wall-mounted speakers or even an RCL combo. That didn't lead to much.
But it did lead me to the RSL CG23/CG3. The overall size is roughly the same as the Def Techs, just a little smaller. But I have never been thrilled with the Def Techs. They sound OK for movies, but too bright at high levels. I've tweaked settings several times, but still fight getting enough clear dialog from the ProCenter 2000 without getting blown away by the treble. And 2 channel, or even all channel stereo music has never been very good.
Are you still happy with the RSL setup? Have you noticed anything lacking from the smaller 4" drivers of the RSL? Did you ever consider the NHT SuperZero and SuperCenter?
I had a smaller Polk surround system before the Def Techs. I know they aren't in the same class, but I'm still a little gun shy about going to smaller drivers. (I think those were 3.5") Just wondering if you think the RSL would be a good choice, or if the slightly larger NHT (4.5" vs 4") might be worth a look. (listen