[Sounds_Insane]

Unless you're trying to save space with an Amp/DSP combo, I think the multiple unit approach looks better, all be it more expensive. Plus you get more flexibility and less likely the whole system is lost with a hardware failure. I wish I could have fit two 4 channels and two monoblocks but went with two 5 channel amps instead.

Side note:
Does anyone else make a unit like this to bypass the factory radio, like a hardwired, mountable DAP? No need for the amp or integration features.

https://www.crutchfield.com/p_500HDS990/Alpine-HDS-990.html