Placement of Components

@bgchz , it depends.

Amplifiers should be located as close to the speaker inputs as possible keeping the speaker wires as short as possible.

Turntables are best in the next room or as far away from the speakers as you can get it. You could make that argument for mechanical devices like disc drives and tape machines but everything else, particularly if it is all balanced makes no difference where you put it as long as it is safe from flying alcoholic beverages, children and the housekeeper.

Hello,

I love the idea of the tt being closer so I don’t have to go up to the front to change or flip the record. I think you are still going to get vibration on the tt either way unless you address that with a wall mount or special isolation. 
the next issue is the cost of cables. I have always heard longer interconnects and shorter speaker cables except your phono cable beyond 2m. 
If you are going to do this then put your amp on an amp stand in between your speakers so you can keep the speaker wire short. Run balanced for noise canceling and the length but more about the noise. 
I agree about the Klipsch speakers in the upper line that you probably do not have to worry about that as much.
before you go to buy expensive cables and racks you should see if you can upgrade your base equipment first. It usually has a much bigger impact over the cables. I hope this helps. 

Rule from Vandersteen is shortest speaker wire as possible and all long runs will be component connections. I run mono blocks so each amp is right next to the speakers and long xlr from pre amp to each mono.

Comb Filtering is both audible and measurable. See below:😎

Mike

@aewarren , there certainly are absolutes but there are issues that may only pertain to certain situations. A good example is you do not want to place a turntable on anything that sits on a bouncy floor unless it's chassis design is well isolated.

Amplifiers should always be placed as close to the speaker as possible. This is more important for lower impedance loudspeakers but it does pertain to all loudspeakers. 

Turntables are always a touchy issue because they are vibration measuring devices and they do not care where the vibration comes from. The more isolated they are the better. The volume of point source speaker drops off at the cube of the distance so keeping the turntable as far away from the speakers as possible is a good idea. The caveated is that there are locations where the bass can be amplified do to acoustic considerations and you certainly do not want to place the turntable in one of these locations.

Everything else could care less.