I have enjoyed Platinum Solo's with wonderful bass extension driven by 35 tube watts per channel for near field listening. These are $700-800 used on Audiogon, very much a bargain. Rear ported so need at least 2 feet from wall behind speaker. Those who favor transistors prefer multi-hundred watts per channel to fill a larger room with this same speaker in its non-monitor "take no prisoners" Superman mode.
best monitor for tubes?
The contenders are Reference DeCapo, Tyler tylos, and anything else you 'Goners with far more knowledge and experience can provide. I have a tube source and tubed integrated, but am open to experimentation (aren't we all!). Bass extension preferred, too, but I know I can't have it all. Thanks!