You can be as fanatical as you'd like about setting up whatever speakers you get. Out of the box just sitting on a stand, the monitor will sound more faithful to the original signal than will the CM30. Bob's only your uncle on the CM30 because nobody expects much out of Bob to begin with. Maybe you'll be perfectly happy with the CM30, but I wouldn't use "less hassle to set up" as a factor, because really almost nothing has to be a hassle to set up.But not convinced about monitor speakers. They have to be calibrated, placed in exactly the right position or they might not sound right. Seems like a hassle, if you ask me. I know that you only have to do it once (in theory, anyway), but still.
Would be great to have something that you just put down or mount on a stand, switch on and Bob's your uncle.