Well, I agree on one point. The crowd would not notice. The crowd rarely knows what is or isn't happening if there is a decent engineer running the ship. Having experienced tons of different setups, I can truly say that your system crossover (especially now adays with all in one DSP powered units) makes a HUGE difference in sound quality. Sure the crowd may not know, but the person who is driving the system will most certainly know since he/she will have to work much harder to make things happen right. The Behringers have this uncanny ability to "muffle" the sound of whatever goes through them. In fact, on a nice rig this would be even more exaggerated since in a nicer rig the cabinets and amps would be capable of outputting all the signal that the Behringer is screwing with. At one point I ordered a bunch of
DBX Driverack PA's for some of our lower profile systems. The features looked great, the price was right (since we were DBX dealers). I do know how to setup a system. In fact a lot of people pay me good money to come retune and rewire existing setups. The PA rack was just a constant headache to try and really dial down the system's. The Behringer is even harder. So, we sold all the DBX PA racks off and bought BSS minidrve's. The minidrives cost about twice what a PA rack costs, but sounds 10x better than the DBX or any Behringer. The whole system tunes easier, runs more efficiently, sounds WAY better, and the EQ's are very usable without frequency buildups and gaps, and without making the boxes sound processed.
In reality, Behringer actually has a better reputation in the live sound world than it does in the recording world. I can actually get away with having Behringer gates and comps in a rack, as long as I also have some nicer DBX and BSS stuff in there. The Behringer comps and gates are actually fairly usable in a live setting. Maybe not as quickly and nicely as other gear, but usable and acceptable none the less. However, NOONE will accept Behringer reverbs, multiFX, EQ's, or system processing.
Maybe I have not been doing this for 25 years, but I have been doing this for anywhere between 30 and 80 hours a week for the last 8 years. I have worked with over 1000 bands and worked on most every system available today. i.e. Meyer, V-Dosc, JBL, EAW, EV, Turbosound, D&B, Martin, Adamson, McCauley, Nexo etc.... It would be an absolute shame to walk in and find a V-Dosc rig with Behringer processing driving it. In fact, it just would not happen. For one, it is nowhere near being on the list of V-Dosc approved system processing. There is a reason companies like V-Dosc are specific about what consoles and processing you can use. It is the fact that they wan't to insure that EVERY time you hear a V-Dosc line array that you are hearing the full capabilities of what it does. Popping a Behringer in there would greatly reduce the advantage of having a V-Dosc array.