I've had my Silverline Sonatinas (Avalon version) IMS for over two years. My buddie has the same speakers, so we've heard them with a variety of components (7 different amps collectively). We both enjoy them very much, and if it weren't for my recent aquasition of a SET amp I wouldn't even consider replacing them. The Moth with 45 tubes puts out 1.8-2wpc, the Sonatinas are a friendly load but only 93dbs - not the best match. Still they sound great together, I can only wonder what the Moth would sound like paired to a more sensible driver, thus my thoughts of speaker auditions.
Not wanting to cost Alan Yun a sale, based on your preferences I wouldn't recommend the Silverlines, or instead of the Sonatinas, I would think the Sonata would be closer to your preference. While the Sonatinas are highly detailed, smooth and have a small footprint they are not "bass happy" speakers. While very pleased with the propulsive bass IMS, there're alot of speakers with a more prominent bass profile.
As far as ratios go, 10 times the monies will not give you 10 times the speaker. YMMV, but I would hazard to guess more along the lines of 2-3x. My advice is that JUST changing one component, even a core component will not typically result in a "very, very wide margin" of improvement. The result of all the upgrades TOGETHER will have or could have a dramatic improvement in performance. Syngery is a powerful thing, it isn't always the pedigree of each component but how well they work together as a system. In my case the SET amp made a big difference, but the resulting change in sound was actually small, its that THAT small change was greatly valued. Some may either not discern the change or appreciate the upgrade from the fine amp it replaced. But I did.
Not wanting to cost Alan Yun a sale, based on your preferences I wouldn't recommend the Silverlines, or instead of the Sonatinas, I would think the Sonata would be closer to your preference. While the Sonatinas are highly detailed, smooth and have a small footprint they are not "bass happy" speakers. While very pleased with the propulsive bass IMS, there're alot of speakers with a more prominent bass profile.
As far as ratios go, 10 times the monies will not give you 10 times the speaker. YMMV, but I would hazard to guess more along the lines of 2-3x. My advice is that JUST changing one component, even a core component will not typically result in a "very, very wide margin" of improvement. The result of all the upgrades TOGETHER will have or could have a dramatic improvement in performance. Syngery is a powerful thing, it isn't always the pedigree of each component but how well they work together as a system. In my case the SET amp made a big difference, but the resulting change in sound was actually small, its that THAT small change was greatly valued. Some may either not discern the change or appreciate the upgrade from the fine amp it replaced. But I did.