Upgrading from Thiel 2.7 to Sonus Faber or Focal???

Might be worth getting REW, a UMIK-1 calibrated USB microphone, and doing a frequency sweep of your room. 

That it took me *so* long to take this step and was a huge mistake.  For $100 and a bit of mental effort (REW is free), you can see exactly what the frequency response of your speakers looks like.  It is very possible that you are not hearing all of the bass the 2.7s are producing due to standing bass wave patterns in your room. 

I spent so much time trying to get more bass out of my Coincident PREs with different amplifiers and the whole time it was just my room (and speaker/listening positioning) causing a 12db dropout at 40hz.  There are no downsides to taking the time to do this in your room.  If you're playing in the price range at which you're looking, it's a necessity.  I was so stupid for not listening to the advice of others who said the same.   

P.S.  I had 2.4s and also wanted more bass... eventually added a Smartsub, but still wasn't totally satisfied.  I suspect it was due to the above issue.  I switched to high efficiency Coincident Super Eclipse IIIs.  28Hz vs. 35hz bottoms vs the Thiels, but a lot more bass in my room.  Probably because of the side facing woofers changing the standing wave pattern...

There’s a nice pair of Joseph Audio Pearl 3s available here now for about $18k if that’s in your budget.  Game, set, match. 

The only time and phase-aligned speaker is Vandersteen at this point.  It might suit your ear. 

For my smallish room, I demoed the Magico A3 and was also considering the Kanata 2 because of the ease of placement (never demoed it). However, I went with a used Thiel CS3.7 (that I completely rebuilt), I think it is still a great choice and definitely not a step down from any of the speakers I demoed. It is rather difficult to drive though. Maybe your 2.7 needs more power. I have no clue about your amp or the specs on the 2.7. I am just going by my experience with the 3.7.

I demoed the following:

Magico A3
Vivid Kaya 90
TAD ME1
Paradigm Persona 3F/5F
Vandersteen Treo CT
Yamaha NS5000*

*The Yamaha is the only one that I liked as much as the 3.7. I need to navigate some house politics before I can buy the Yamaha for another room. It has more bass than the 3.7 and is a little warmer (maybe). You can get home demos of the Yamaha from the online seller.

Definitely not Focals if you want warm, though they are warmER than Thiels.

I think the 2.7 has the same COAX as the 3.7. If so, the Focal is definitely not as warm as the Thiel.

Might be worth getting REW, a UMIK-1 calibrated USB microphone, and doing a frequency sweep of your room.

This is a great suggestion. I did the same to get my large speakers to fit into my small room (plus some other things with the data).