My Lab came with the r27ed, I ha a friend years ago give me the RXT4 without the stylus, and the at13ea came with the 960 I just received, alas they al are in need of styli, hence the question. Now to get one ordered. I have not heard the at nor the rxt so wasn't sure, although the "specs" favored the at, then the rxt, with the r27 last. Sometimes specs don't tell the "story." Having used the r27 in the past I was hesitant to jump at the others due to "specs." Thank you.