Please help - system "brightness" problem

I recently purchased a new pair of speakers and stands - Tyler Acoustics Reference Monitors to replace my B&W Matrix 803s in a small listening room. I was looking for a tighter, faster speaker, particularly in the low frequencies.

The system includes Linn Ikemi CD and Plinius 8150, HT Truthlink ICs and Pro 9 cables. I never had a problem with brightness, but the new speakers have made the system very "bright".

Any suggestions would be greatly appreciated.
Joel