Upgrade from Harbeth Compact 7

If you like the basic sound of Harbeth, the SHL5 is, IMO, a superior speaker with a more coherent sound, a bigger soundstage and deeper bass. Harbeths are not known as rock speakers, but if you are satisfied with the C7 in that regard, the SHL5s do more of it.

If you are truly looking for something that will play much louder, I would look into the Coincidents or, if the rest of your system is up to it, a used Wilson Sophia. With the right gear it can sound very powerful, but it is a tough speaker to drive and sounds like absolute crap with amplifiers that can't handle its tough load. Good luck.

I had the Harbeth Compact 7 for a while, then changed to the Proac D-40r, which IMO was a significant improvement. You can see my system in the link below.

Harbeth M40.1 , Active Gradient Revolution or ProAc D-40r ( already mentioned)

Daedalus Audio DA-1.1AP V2. I just posted on these so am feeling a little "shilly" but I was in the same boat--looking for something with the midrange magic of the Harbeth's AND the ability to project a bigger, more dynamic sound. After a two year search Daedalus fit the bill perfectly.

Try adom audio. You might overlook them because they often fall under the pro audio rather than computer speaker category but they are great. Better in terms of size for size than audio engine imo bc of the bass and midd. Both good though.