Bakti, I only compared the Mercury with the Pass Labs X2.5 which I enjoyed for 16 months. In my system the Pass was very transparent, dynamic, neutral, musical, smooth and had excellent resolution. I was probably 95% satisfied. I only tried the Mercury because so many audiophiles state that a tube preamp can add alot to an otherwise SS system. Research led me to the Mercury. I tried it and I was so impressed, I didn't look any further. It moves beyond the Pass X2.5 in accuracy, emotional enjoyment and musically in my opinion and you know my review comments. I would have tried the Ultraverve, but because the price of the Mercury was in line with my X2.5, I felt it was a better place to start.