Keep in mind that the equipment rack will impact your sound, particularly if placed between your speakers or on a side wall between the listening position and your speakers. That being said, my rack is between my speakers but about four feet behind the front edge of the speakers.
We didn't want to place our rack behind our listening position because of the long interconnects (and associated cost) that this positioning would require. We tried a front corner location, but we heard the rack there and the sound was not balanced. A sidewall placement in our 14.5' x 26' x 8' room wouldn't work because the equipment would then be pushing into the acoustic space plus the room would no longer be symmetrical to support the optimal soundstaging we were seeking to achieve.
Our final solution of "centered but well back" from the plane of the speakers was our best compromise to get 1) balanced sound due to symmetrical placement, and 2) fairly short interconnects. We still can hear the rack's impact on the soundstage, but the impact is slight.
So, general thoughts: don't let the rack be between the speakers if also close to the plane of the drivers -- anything between your speakers is going to impact soundstaging; keep the room as symmetrical as possible; seek to use shorter interconnects if possible for both sonics and cost (and, sure, I've heard some great sounding rooms with long but expensive cables); remember that everything is a trade-off one way or another.
Good luck,
