Carver PM900 power amp any good?

I am currently using a Bel Canto S300 (150w per channel) to drive the bass units on modified Martin Logan Vantage speakers. The speakers were modified for biamping. I have been told that an amp, like the Carver, with a lot more power will improve and tighten the bass performance and all it needs is raw power not an amp with a lot of finesse. Will the Carver do the job or any other suggestions using second hand and for a low price. No use suggesting Audio Research or Krell. For info I am using a Rogue Audio Stereo 90 with KT90 tubes to drive the electrostatic panels.