That is a silly proposition. Good systems play everything well. If they can't they are not good systems. One great pair of speakers is always better than two mediocre ones. Same for amps.
@glennewdick We use to run stacked Quads all the time. The HQD system is a classic. Hartley subwoofers, stacked Quads and Decca ribbon tweeters each one driven my it's own Mark Levinson 25 watt class A amp designed by John Curl. All this is acting like one speaker system. The OP is contemplating two entirely different speaker systems for different moods.