As mentioned, I would go for the KP3/KP3+ instead of the Quad because of the lack of midi. Using the Elektron sequencer to sequence the KP3 can give you some serious next level options.
As for fitting it into your setup, it is hard to say for sure what the best option would be without knowing more about your current setup. You could run the OT’s outputs into it, and out to your speakers if you wish. Mine is pretty permanently attached to my MDUW in my patchbay, and I do notice a bit of signal loss unfortunately. The benefits outweight the negatives IMHO, and I’d rather just put a compressor in the mix to get back some of the punch, instead of not using it.