Well, I am very pleased with what Anthony has done to my Tact, his objective is to achieve the cleanest possible sound. I was at his home listening to his fully modified Millenium MK3 and I thought it sound awesome, however I also realized that we belong in different camp:- He likes accuracy and details, whereas I like a little bit of "noise" and "coloration". I felt that having his fully modified Tact 2.0S in my current setup is just nice, especially when combined with the Moscode it gives me just the right balance of musicality and details, adding another piece of highly accurate digital amp may be a little overkilled.
But I'm always open to experimenting, I can't speak for 2150 because I haven't heard them, you want to loan me your Tact 2150 so I can hear it? aa aa
You should tried an Aberdeen fully modded Tact 2150. 
PS- if you're into Jazz, here a great site: http://www.allaboutjazz.com/