I picked up a lonesome center channel speaker from a surround sound array. The center channel speaker is designed for the narrative voice from movies. From their specs they seemed to be perfect and have proven to be so for HF audio on my FT-950. It's a Sony and I got it for $8 at a thrift store. I have since seen more of them. Look around.
One of my friends has this same setup, although he has a Kenwood center channel speaker. Looks nice on the shelf. Sounds amazing! With I had thought of this before buying a Yaesu SP-8...