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.