In my experience B&Ws need decent power to sound good, and more important, lots of current from the power amp.
For a budget, I recommend Parasound power amps, the used discontinued HCA series, model 1500 or higher (200 W/Ch). Assuming of course you integrated amp has a pre-amp output to drive a separate power amp. You can often find these for about $500-600 used.
Regarding brightness, I have found for some B&Ws moving them a little further apart reduces the upper midrange re-inforcement you sometimes get. Clean power amplification is a must as these can be very revealing of HF distortion.
For a budget, I recommend Parasound power amps, the used discontinued HCA series, model 1500 or higher (200 W/Ch). Assuming of course you integrated amp has a pre-amp output to drive a separate power amp. You can often find these for about $500-600 used.
Regarding brightness, I have found for some B&Ws moving them a little further apart reduces the upper midrange re-inforcement you sometimes get. Clean power amplification is a must as these can be very revealing of HF distortion.