Hello. I have heard the M40Ti but have not heard the M50Ti. While I liked the M40 very much, I wondered if the M50 would be worth the additional cost. Also, I do prefer the M40's slightly smaller size. I am mainly interested in the difference in bass between the two. I feel that the M40 responds very well when the source material has high bass content, but it doesn't add a lot of "weight" to ordinary orchestral recordings. I'm wondering if the M50 would convey that weightiness better.