Thanks for all of your responses guys (or gals).
I think the issue I'm having is likely a combination of all of the factors mentioned above (speaker choice, driver configuration, cabinet resonances, room acoustics...)
Sadly, most of the speakers mentioned are out of my price range at this time. I'm hoping to spend around 1K or less used.
Pryso: Yes, I should refer to them as monitor or standmount. Thanks for that.
Mapman: Can you make a recommendation for a speaker that has "as few transducers as possible and for the configuration of those drivers present to approximate a point or line source and a neutral timbre overall."?
I plan on going into specifics about speakers I've heard and asking for recommendations but I'd prefer to do that in a seperate post.
What I'm hearing so far, is that most of you believe you CAN in fact get that "monitor magic" I've been experiencing in a floorstanding speaker.