@Jefant
...Bass is certainly not bloated/flabby regarding Thiel Audio...
I have CS5i's and certainly agree that their bass is tight and also nuanced...if you have a good source (and amp). My old thinking was that the source would impact the treble more than the bass. Not true.
I run a PWT and recently acquired a Mystique V3 DAC, which improved sound across the board and things are fine at any volume - low and high. The bass is full without bloat and there is added detail that helps the sound seem more solid. The Mystique also helped expand the soundstage especially laterally.
This has reaffirmed my faith in the Thiels and slowed down the new speaker search.
Not to go off topic, but I also recently switched to silver interconnects, which brought more presence to the tweeters and improved the live sound.
So far the CS5i's are not the weak link in my system. However, my experience is that I have had to spend some bucks and not try to go with the latest "giant killer" gear.
Thanks for listening,
Dsper