I guess I'm more of the 'I want flat!' school of mixing. Sure, I've used NS-10's in the studio, but those were primarily to reveal flaws, and have a studio to studio transportability of mixes thing. I have to confess that, when I'm noodling at home, I don't want to have to 'imagine' what it would sound like on a full system, I just want to hear it that way!
But thanks for pointing out the powered sub... That probably goes a long way to rectifying the Monitor One's abysmal bass response!

My 824's are the ultimate arranger accessory! And still 1/3 the cost of the arranger.

BTW, does your wife run a mono Bose system, or does she go stereo for the piano? Perhaps she prefers the Roland's because they collapse to mono a bit more graciously than Yamaha do?