Actually none taken - I agree with you, but I am not a fan of very heavy bass. The bass on S45-2s is very accurate but rolls off at just below 40Hz quite rapidly. I must pull mine out again and compare them to my M100s!
I wish I kept my pair of S45.2's as they are much more pleasant to listen to compared with the S75's that has a very "rumbling" bass and shrill highs that quickly leads to listening fatigue. It would be ideal to have them placed more than 2-3 feet from the wall, but I don't have that much space (and I doubt I will for the next few years as a poor student)