With your hearing problems, I can't think of a speaker to make dialog hard to understand than those Bose 901s.
Very, very few speakers have clear and natural speech reproduction.
I am probably not the one to ask, as I do not buy speakers, I design and build my own. However, since the advent of AV and the need for speakers with good natural speech, this has become a particular line of research and study for me.
If I had to point to what is the greatest fault of the vast majority of currently available speakers, it would be their inability to reproduce clear AND natural speech. That is incredibly rare in commercial speakers.
The ones that I have auditioned that do the best job in this regard, have been from KEF speakers with their coaxial drivers.
These are above your budget, but to you would be well worth it.
If you also bought the
matching center channel, that would help significantly, with your problem. That would get you over budget, by a little more than 100%, but, I'm certain you would find it worth the expense.