I had an SLP98 and I agree with you it can have that tendancy. You must have good speakers - many of them will mask sibilance. A friend of mine also had a Cary SLI80 and ended up having to get rid of it due to sibilance and a general projection of the upper mids that annoyed him (the two effects are linked in our opinion). He tried MANY tubes but it just never quite went away.
Also, I don't consider brightness to be the same as sibilance. Brightness is curable in many cases but sibiliance can be stubborn. Brightness is a higher frequency issue than sibilance is.
Arthur
Also, I don't consider brightness to be the same as sibilance. Brightness is curable in many cases but sibiliance can be stubborn. Brightness is a higher frequency issue than sibilance is.
Arthur