People That Have Upgraded From Harbeth 30.1s....


.... what speaker did you buy? 
dhcod
I find Harbeth speakers, generally speaking, to be very well balanced.  For me they do a nice job across a wide variety of music.  Really big rich recordings sound rich, but not overly so.  Thinner recordings still have some juice and still sound good.
I remember concurring with a reviewer who said something like "With the Harbeth, everything is presented at the correct level.  Mixes sound right." 
I can't think of a single voice in audio today that speaks with as much clarity, logic and common sense as that of Alan Shaw.

Many, many times I was taken aback by what he had written on the HUG website, only to later find out that he was right...

https://www.harbeth.co.uk/usergroup/

dhcod,

You mentioned,
" I like my 30.1s but I want more of everything! More bass for sure. More dynamics too. A bigger image."

The M40.2  might be a good a very good option for you, considering you like your M30.1 speakers. 

That is the exact upgrade I made.

You will get more of everything including a more extended defined bass, dynamics ,  imaging ,  larger soundstage and most importantly ,a complete full range sound. 

The M40.1 is also a good speaker. A used pair of these could be a good choice for you.

 The M40.2 is more efficient ( easier to drive) , room friendlier and more transparent than the M40.1 though.




The Harbeth's are a good enough speaker to easily decipher the difference between entry level and a $2,000 integrated. If he suggests otherwise, he is selling the speaker short. Cheers -Don