I love Evans, all of their products are amazing.
I record a lot in my studio, and these heads are simply amazing.
Sound is amazing, quality is superb, unbelievable durability.
I usually like to have fresh new heads for every studio work, BUT sometimes it can happen that I have a sudden recording request, and I might not have new heads in stock, or I might have to start the sessions right away. In that case I'm anyway going to be alright, because these heads are phenomenal, and will endure hours and days or weeks of heavy hitting. No loss in quality or sound. Evans is just the best for how I play!