I bought the M22's and I love the sound comming out of them.
Now that I've watched the Samsung LN37B55, I can say that I'm a little dissapointed. Looks fine in bright and ambient light, but when you turn the lights out at night, the darks are grayer than my Samsung LN26B360. Noticeable especially in the black bars in 2.40:1 movies. Also, the viewing angle is not as wide as I would like. But, I only paid 700 instead of 2500 for it. The lighting in the stores seems to be at optimum to make TV's look better that at home.
