I suggest Emotiva be dumped for strong technical reasons based on his desire to build an active crossed system. The amps have no gain controls. I'm not going any further there. That's fundamental number 1. You can't have a properly balanced system if you can't adjust your amps. You canot use the processor to adjust the volume and gain of your system. You need to use the amp gains. The other issue with Emotiva is they produce high gain amps. Not what you want.
You like Emotiva? Buy it all day long if that's what sounds good to you. I'm just stating some facts concerning this thread.
As far processors, I've worked with Behringer, Crown XTI, EV dx-38, DBX 260 Driverack, and Ashly Protea 4.8SP. Once again I recommend the best processor you can afford becuase this is the place or criticality for controlling the system. There are pluses and minuses to all these. Right now I have the Ashly and am loving it since day 1. I've had it for a couple of years now.
Obviously, choice of amps is of personal taste. I am running an MCM-3 Grand with Klipsch 684 subs. I like the sound of tubes but they are not practical for me to use in such a complicated system with so many amps. I found old McIntosh solid state MC-250s and 2100s that sound very much like tubes and spent a couple of years acquiring them and having them reworked by Terry DeWick in Tennessee. I have a McIntosh tube preamp that also helps bring the tube sound to the system.
For bass and sub duty I use QSC PLX2 amps so I am sure to provide the power the bass moudles and subs require.
So I'm not averse to the pro amps or pro equipment at all. But the 40+ year old Macs destroy the brand new QSC in clarity on the upper frequencies. They are home audio amps from the late 60s / early 70s.
If I was starting over and not allowed to use vintage equipment I would select my processor first, then select a preamp ahead of it that was compatible. Then, and last.....I would select the amps. I would look for good home audio with gain controls and acceptable gain.
Of course this is all in a nutshell. The first couple of active systems I built sounded worse than when I had the passive networks in my speakers. I went backwards and had spent a good few bucks. I had time alignment but non-audiophile sound and wasn't a happy camper at all.
KPT-MCM-3 Grand + 2 KPT-684 subs, '73 Cornwalls (C DB 15), ' Single '77 LaScala (LS BR), '81 Heresys (HOL), '83 Heresys (HWO).