I haven't tried signalrgb, but openrgb is good enough for me. I've set it up (with some plugins and additional .json manual editing) so that my CPU fan is a separate zone that goes green-red according to CPU load, and the rest of the fans have a nice swirling blue-purple color. It was a bit of a pain to actually manage to split it like that, but it works very well and looks beautiful, so ain't touching it any more :)