The TSMs, even in their latest versions do not exhibit real bass power, certainly not like the Zus. Consider that element carefully when thinking about your goals. TSMs have a wonderful midrange, but not the top end definition and purity of ribbon tweeters, for instance.
I've heard the Zu Definition and Def Pro. The original Definition has a spitty top end, which I didn't like but the later Pro was very nice, extended, and detailed on top.
I've heard the Zu Definition and Def Pro. The original Definition has a spitty top end, which I didn't like but the later Pro was very nice, extended, and detailed on top.