Placement of electronics

I've always placed equipment on side wall about mid way along room length. (Atma MP-1, MA-1, Modified Lenco TT, Wyred 4 sound Dac 2, Maggie 1.7, strategic placement of reflectors, bass tubes, cables are top Analysis Plus and Nordost.). The sound, sound staging etc is what I've always wanted. However, I want to upgrade the interconnects between the pre- and the amps, which are 1 foot behind the speakers. Now, the length of these cables is 20 feet. The interconnects I want to use are far too expensive to run 20 feet.

Finally, the question: If I put all the equipment between the speakers, including the TT, won't I pick up more vibration issues?