I have owned a lot of Proac speakers. If you are looking for floorstanding Proac speakers in that size my preference on their models in the Response range would be as shown below:
Proac D 30r (this may be outside of your budget
Proac D 28
Proac D 2.5
Proac D 25
The Studio 140 II is is about the same size and is also a good sounding speaker, but not as refined.
Proac D 30r (this may be outside of your budget
Proac D 28
Proac D 2.5
Proac D 25
The Studio 140 II is is about the same size and is also a good sounding speaker, but not as refined.