Platinum Audio Solo's are quite fine, and you really get to enjoy the bass foundation in all your recordings. Because the company is gone, the used price is in the $600 range. Your 90 watt tube amps are going to be able to power these in their sleep, as I used 35 watts per channel in a twelve by fifteen foot room, and never felt restricted dynamics or extension, despite some Audiogon warnings that only mega-amps need apply.
There was something very special about the overall presentation that really could fool listeners into guessing their used price must be much higher.