Had these tires for 3 seasons now (have separate tires for winter) and the Avid ENVigor surprised me. I am very hard on tires. I do occasional drag racing and to this day I have 1 last season of tread left. I drive about 5000km per year ( mostly highways) and I can assure you that the ride comfort is excellent and the noise is almost not present (or I just don't care if it makes noise anyway I have a catback so I mostly hear the exhaust over anything..).
In conclusion, if you are looking for excellent traction on dry roads even on wet, these are very good tires for their price! I you thought about buying these tires I can assure you that they will last and performed as described and even more (tested on Quebec roads). Oh and don't use theses tires in snow, buy winter tire instead it may save your life.