Without knowing what speakers you have it's difficult to say. I have Wilson 5.1's, a CAT Ultimate and a Levinson 335. This combo is wonderful. But, my speakers are a difficult load and are more Row "A" in tonal balance. The Levinson is a bit laid back and has the juice to drive the speakers with ease. Hence, a great match.
If you are considering tubes CAT makes two amps.
If you are considering tubes CAT makes two amps.