amplifiers for Kappa 9's

I have seen some feedback in here about the use of Bryston Amps for driving Infinity Kappa 9's, and agree that these are not the best amps to be using for these speakers. This is how my current system is set up, using 2 4B-NRB's, 10B Crossover and 12B Preamp... and MIT Cables throughout. I do find my Kappa 9's are very bright, but do not lag in the bottom end with the use of my Bryston amps. I am thinking about going to a tube amp for the top end, such as an Audio Research VS-110. I feel this will compliment my system quite nicely, however, any input or feedback about my idea would be appreciated.