Well, you can have short speaker cable runs without having an equipment rack between the speakers.
All of my equipment is in one of the rear corners of the room, except for my two monoblocks, which sit on the floor (actually raised a little) next to the speaker they drive. Long "Balanced Cable" run - short "Speaker Cable" run. This allows for the shortest possible speaker cable runs. This could work almost as well for a stereo amp as well; it will be along the front wall - just centered between the two speakers.
Ensuring there was no RPTV, no Entertainment Center, no Equipment rack between my speakers was one of the priorities of designing my HT Room. To this end, I also chose a front projector (as opposed to a RPTV).
Of course, this only works fully for folks who do without a Center Speaker (as I do). But my theory is that Center Speakers are much more neccesary in systems that have a "presence" between the front speakers (by "presence", I mean RPTV, Ent.Center, Equip.Rack, etc). Since these items diminish imaging/soundstaging when listening to 2-channel music, it follows they would negatively affect imaging when watching movies - hence the need for a Center Speaker to keep the dialog locked in place.
However, if there is no "presence" between the front speakers, a Center Speaker is not nearly as important. Precise stereo imaging for music equates to more proper imaging for movies.
Kevin