You might try a McCormack DNA-1 or DNA-0.5. They can be found on the 'Gon for $500-$700 all the time. They have a higher input sensitivity since they were designed mostly for McCormack's passive preamps which should be a plus if you still want to drive them w/o a preamp. If you still have a bright sound, it won't be the amp.
Also, don't forget that you can face the speakers toward each other wired out of phase and play white noise through them to speed the break-in process.
Dick
Also, don't forget that you can face the speakers toward each other wired out of phase and play white noise through them to speed the break-in process.
Dick