My humble suggestion is to use a solid state amp. to drive the woofers and a low powered good quality tube amp. or tube monoblocks to drive the midrange and the tweeter. The solid state amp. does not need to be Krell and certainly not an integrated amp. You can use a good quality solid state amp. like Bryston or Parasound which can be obtained in the used market for $1000 or so. Invest your money in a good tube preamp and tube monoblocks. In this configuration, you will get the slam and tight bass of the solid state amp. and the sweetness and finesse of tubes on your midrange. Ideally, you should equalize the bass with an equalizer such as a Rane unit ( $700) and take measurements using a spectrum analyzer to ensure linearity of the frequency spectrum. The rane unit has knobs to adjust the overall bass level as well for optimal results. The sound that you get is better than with a 100 Mark Levinsons put together. I use this configuration with excellent results in driving my B&W 801s.
