I don’t know, high end monitors you can usually buy individually. Don’t know with the Yamaha’s. Having two and running stereo would generally be better, depending on your budget. At $200 I’d certainly rather buy one $200 speaker than two $100 speakers. But at $2000 I’d easily buy two $1000 speakers rather than one $2000 speaker. With two monitors you can also hook them up to your computer for other uses as well so I’d go for that.