First of all it depends on what do you consider mid-fi? Its relative as even a pricey system could be considered mid-fi by some.
I listen to a lot of EDM/downtempo/Deep House and I'd say a highly resolving system definitely sounds fantastic when the specific recordings are extremely high quality.
Nicolas Jaar, Bonobo, Koop, Tosca, Kruder & Dorfmeister, Massive Attack, Thievery Corp, James Blake all have fantastic sounding albums that sound great in my system. Having good bass certainly helps, but a lot of these albums also have great mid and high frequency detail and live instrumentation.