Tara Labs is kind of in between. My system is wired with Tara Labs Decade, I find it a nice balance of music. The XLO is faster and more accurate, but can be cold or sterile with some equipment. The Tara is faster and more accurate than the MIT, but the MIT is warmer and sweeter. So IMHO, the Tara falls in between the XLO and the MIT. The Tara is sweeter than the XLO and more accurate than the MIT, but on the other hand the XLO is more accurate than the Tara and the MIT is sweeter. It's a matter of musical taste and equipment/room matching that will dictate which will work best for you.
BTW, I like the Decade better than the Air series.
BTW, I like the Decade better than the Air series.