Lyle, taking a closer look at your system it seems to me (IMHO) that the weak links regarding midrange forwardness could be the anti-cables (great for the price but outclassed in your system, IMO) and the metal dome speakers.
In general, solid core cables made of a single gauge have a "preferred" range of frequencies where they deliver the most dynamics. That's why better louspeaker cables use multiple conductors and multiple gauges in order to spread-out the "spotlight" frequencies.
Since you can not easily change the metal speakers, I suggest that you try better speaker cables (I like Van den hul Inspiration, VDH Supernova and Tara Labs Air, Kimber 8TC if budget is a concern) and a Fusion Enchanter CU power cord. The copper-based PC plus "musical"speaker cables will nicelly flll-in the lower-midrange and make your system more even-handed from upper bass to upper midrange, you will hear a less forward/fatiguing midrange presentation.
I hope this helps